Bitlocker on Hyper-V Virtual Machine

Update 2017.11.29 - Thanks to for the idea, I was able to get FDE working using a pass-through disk, see bottom of post for more info.

Short post to go over something I found while researching Bitlocker Full Disk Encryption on Hyper-V virtual machines.

I was testing Enabling Bitlocker during our Task Sequence, and I didn’t have any physical machines to test on, no problem right?  With Hyper-V, you can now enable virtual TPM on Gen2 VMs, and have all the yummy goodness of UEFI, Secureboot, Bitlocker, Credential Guard all on your VM!  So I started testing, everything worked!  But when I checked the Bitlocker Status (manage-bde –status), it showed I was only encrypting Used Space.  While this would be fine for a Virtual Machine, I was confused because I told it to use Full Disk, NOT used space.  I ran many tests, trying several different things, but in the end, it never came out as I expected, with Full Disk.  Even post OSD, if I decrypted, ensured policy was set for Full Disk, it would only encrypt Used Space.  Finally, I gained access to a physical test machine, ran the exact same Task Sequence, and there it was, Full Disk Encryption. – Testing done on Hosts: Win 10 1607, 1709 & Server 2016.  VM’s running 1703 and 1709. Security settings were set to Enable Secure Boot & Enable TPM, tested Dynamic expanding & fixed disks. (Not Pass-through)

To Summarize.

  • Hyper-V Virtual Machine = Used Space Encryption only with Bitlocker *Unless you can use a pass-though disk.
    • This is by Microsoft Design, Bitlocker is “Hyper-V Aware” and will only run in Used Space only mode, even if your policy is set for Full Disk
    • Remember to eject your ISO you booted from before the Bitlocker steps, or it will error
  • If you need to test your Full Disk Encryption OSD settings, do it on a physical machine. - Below I have two screen captures side by side.  Left side = Physical Machine & right side = VM on that Physical Machine.  Both machines ran same TS telling it to use FDE, but only the Physical machine actually used FDE.

How do you change your TS from doing Used Space to Doing Full Disk?

  • Disable the Pre-Provision Bitlocker Steps
  • Add Registry key to set Full Disk Encryption before “Enable Bitlocker” Step.
  • Set “Enable-Bitlocker” step to Continue on Error
    • This will set several policies settings, like save the key to AD, and which way you want to deploy bitlocker (TPM only, etc)
  • Add Additional Manage-Bde Step: manage-bde -on C: -RecoveryPassword

Here are the details for the steps in my TS, as you can see, I also set it to use XTS AES 256 (except for flash media, which I use older type so it's more backwards compatible with other Windows computers)

 

 

2017.11.29 - Getting FDE to work using Pass-Though

Using an Offline Disk on the Host, and setting that as the drive on the VM, FDE works.

 

Thanks Paul, can now test FDE on VM!

Clean Up Storage Pre Upgrade

Just another group of tasks to add to your arsenal.  We run a Check Readiness step before our upgrades, with a minimum of 20GB Free. We have many clients that do not meet this minimum requirement and fail, and then have to remediate. While we have long term plans to automate much of this, and prevent the Task sequence from ever running on machines that don’t reach these pre-reqs, for now, a Band-Aid.

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Step Breakdown “Storage Cleanup” Group
Run only if FreeSpace < 20GB
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This same query is placed on several steps.  If the step that is cleaning up is successful at getting FreeSpace above 20GB, then lets continue on.  Otherwise, the last step that will run if still under 20GB is the restart, to help flush things from the previous steps.

  1. Cleanup User Temp Folders
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  2. Cleanup c:\Windows\Temp
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  3. Delete user Profiles over X Days inactive
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    This requires that the delprof2.exe file from Helge Klein's site. (It is in the download, as I have permission to redistribute it)
    You can change the day to any number you want and run this steps as many times as you want.  My idea was that I would start at a high number, then slowly lower it, 360, 180, 90, 60, 45, 30, 20,15,10,5, and have the wmi query on it, so as soon as it dumped enough old profiles, to get 20GB Free, it could continue on leaving newer profiles.  The script also looks up the top console user, and excludes that from the deletions, so even if the primary user hasn't logged in for awhile (on leave), it won't delete that profile (as long as it's still the top console user, and not some tech's account).  This is a powerful step, be careful with it, as you could accidentally remove a profile you didn't want to. If you have some profiles you don't ever want to delete, you can exclude them by adding an /ed:user in the script (look to Helge's documentation for more info).
  4. Cleanup WinSXS folder
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  5. CleanMgr – All Options
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    This was borrowed directly from stealthpuppy.  I had written something, but then found this and it was just easier to use this.
  6. Restart Computer
    The restart only happens if there still isn't 20GB Free Space.This will be added to the Task Sequence Module Download HERE.

ConfigMgr Task Sequence Collection

This is my "Clip Show" blog post, but hopefully you still find it useful.

I've been building out a Task Sequence that is just a collection of Task Sequence sections, or handy steps.  I'll use this TS to pull sections from when I create new Task Sequences, and add / modify as I test in "Real" deployment Task Sequences. DOWNLOAD HERE *Note, this is not an actual Deployment TS, it's meant to be imported and then have parts copied into your own TS.  All content, including some not used directly in this TS is included.

I have several sections, also a few handy steps for pause, wait, copying CMTrace local, and so on.  Many of these are borrowed from great community leaders such as Mike Terrill, Jason Sandys, Jörgen Nilsson, Mark Godfrey, and others (Sorry if I missed anyone)

  • Power Settings, CCMEXEC Change & Revert - This section will grab your current power settings, place in variable, set system to high performance, then restore them at the end of your TS.  It also has steps for changing the CCMEXEC service to auto start, instead of delayed, and back.
  • Upgrade Lockscreen - This section will change your lockscreen, designed for the Win10 In place upgrades.
  • User Lockouts - This section will use local group policy to block any users, either via AD Group, or users from local machine
  • AutoLogon - This adds account and keys for auto logon (for testing in lab)
  • Enable Mouse Support - This will enable the mouse cursor in the Windows 10 TS after WinPE steps are complete.
  • Windows 10 Tweaks - Several sub-sections of Customization gathered over the past years, many demo'd @ MMS2017

Power Settings info: https://garytown.com/change-and-restore-power-plan-during-ts

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CCMExec Sevice to Auto & Back:

 

Upgrade LockScreen & User Lockout : https://garytown.com/change-lock-screen-image-during-upgrade-ts
I’ve made a few modifications since the post about this, moving the cleanup to a scheduled tasks, that will run during the upgrade deleting the Lock Screen images / Keys & cleaning up the Locked Out users, so users can log back in after.  It will also clean up the scheduled tasks.  I’ve left in the steps for you to add after the upgrade to do clean up as well, leaving you many options on how to implement this idea.  Each step has detailed notes in the descriptions.

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AutoLogon: https://garytown.com/configmgr-osd-lab-add-autologon-account
Nothing changed from the blog post, just a reminder, don’t do this in production.
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Enable Mouse Support: https://garytown.com/enable-mouse-support-in-win10-osd-during-state-restore
or Microsoft's Official Post 13 days later: https://blogs.technet.microsoft.com
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Enable

Reset (Disable)

 

Windows 10 Customizations / Tweaks

SetOSDInfo: https://home.configmgrftw.com/configmgr-osd-information-script/

Most of this section is straight from MMS: https://garytown.com/windows-10-customizations-mms2017-demos
Windows 10 Features, enable or disable some “features” in win10
OEM Info, allows you to set the information that is displayed in “System”
Explorer Tweaks – Covers things that modify things displayed on Desktop or Explorer

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Group Branding includes changing the Lock Screen, Wall Papers, User Icons, Start Menu
Default Profile are tweaks that apply only at the user level, so these are added to the default profile.

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Remove Default Apps, either a script to remove everything (That is specified in the script, not actually everything) at once, or a line by line option to be granular.
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Change Lock Screen & lockout users during Upgrade TS

Update 2017.10.26 - After a twitter convo with @brookspeppin, I added two additional steps for the legal notice.  I had ones to delete them, but Brooks said he had used them as the upgrade message, skipping everything else.  This was something I had considered, but after talking it over with the team, decided against it "No one reads that", but after seeing Brooks' screen capture, I tend to agree that it's worth having in your pocket, so I've added it to the Task Sequence Export that's available to download.  Here is a screen capture and keys needed.

Update: 2017.09.26 - Was able to take advantage of local group policy bypassing the need to talk with your Group Policy Team.  You can do it all in the TS..  Go to bottom to see how..
- Updated info again on 2017.10.13 here (includes updated download): https://garytown.com/configmgr-task-sequence-collection

Original Post: 2017.09.15:
What: Changing the Lock Screen Image to warn end user that the system is performing upgrade, also preventing users from logging on during TS.

Why: So users don’t call upset when they logon to a computer then get rebooted when the TS reaches that point. (For those groups whose users don’t read all of the communications about their machines updating)

How: Downloading Pre-created Images, setting registry keys, and to lock out users, that requires a little help from group policy (1 time setup)

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Back story: ProgressUI does not display on computers unless a user is logged on.  If the process starts at it’s deadline, and no one is logged on, it will start running the task sequence with no visible signs until it reboots into setup, and the user sees the Windows 10 Setup screen.  Lets say the TS has started, and it’s in the middle of downloading the content, which can take awhile on a slow link.  User starts to do work (watch cat videos), and then they see a message pop up finally saying "computer will reboot in 60 seconds, you’re welcome", they won’t be so happy, worse yet, they look away for a couple minutes, or are grabbing their coffee to come back and find their computer rebooting to setup.   How can we draw more attention to the fact the computer is doing something.. how about make a bold lock screen image warning the user of the upgrade, or even prevent them from logging on.
Here is a picture, the PC was logged into during the TS, the User has no idea it’s in the setup.exe phase of the TS, going to reboot them in a few minutes.  This is what we’re trying to avoid.
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Lock Screen is pretty easy, I have a couple steps in the beginning of the TS that downloads the files I need to a local folder, then deletes them at the end.

I have this same process repeated several times, before different large steps.  In my Example, I update the Security Software, which takes 20 minutes, so I have a custom lock screen image saying it’s updating Security Software.

I then repeat the process after the Security software is installed, and change the Image to say “Upgrading Windows OS”, which will be there until it reboots into setup.  At the end, I delete the registry keys allowing the original settings to take over and original lock screen image to return. (If you’re using the registry keys to apply a custom image, just set it back to what it was before, you could easily capture that key into a variable, then set it back at the end, or manually add it if everyone is the same, or have group policy fix it later)

Please modify steps to fit your environment, file names / location are only for example.

  1. Make Temp Folder for OSD Stuff
    1. cmd.exe /c if Not Exist "%programdata%\OSDReqs\" (md %programdata%\OSDReqs)
    2. image
  2. Copy Background Images (From your package with custom backgrounds)
    1. Package Contents: - Download Mine HERE
      image
    2. xcopy OSDImages\*.jpg %programdata%\OSDReqs /Y
    3. image
  3. Update Lock Screen Image Group (Only set to run if no one is logged on)
    1. WMI Query: select * from win32_computersystem where username is NULL
    2. Set Image 1 (Security Apps) – Modify the ImageName to match your needs.
      1. REG ADD "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Personalization" /V LockScreenImage /T REG_SZ /D C:\ProgramData\OSDReqs\ImageBackGroundRed-DoNotLogonSecurity.jpg /F
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    3. Tweak - Delete Legal Notice on Logon (1 of 2) –Optional – Removes the Legal Notice
      1. REG DELETE "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v legalnoticecaption /f
    4. Tweak - Delete Legal Notice on Logon (2 of 2) –Optional – Removes the Legal Notice
      1. REG DELETE "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v legalnoticetext /f
    5. Stop Process -Name WinLogon (Forces LockScreen to refresh.)
      1. powershell.exe "if((Get-WmiObject win32_computersystem).username -eq $null) {Stop-Process -Name winlogon -Force -Verbose}"
    6. Wait 5 seconds – Allows time for the Lockscreen to refresh before continuing. – Optional
      1. powershell.exe "Start-Sleep -seconds 5"

As for the locking out of users so they can’t log on, here is how I did that in my lab.

I created a group policy called “Deny Logon Locally” - TechNet

  1. Computer Configuration\Windows Settings\Security Settings\Local Policies\User Rights Assignment
  2. Set Deny logon Locally to "DenyLogonLocally" (Which is the group we’re going to create in the TS)
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During the TS, I create a local group called "DenyLogonLocally" and populate it with all of the users who have logged onto the local computer (Thanks @keithga1) for the powershell code.

  1. Create Local Group DenyLogonLocally
    1. net localgroup DenyLogonLocally /add
    2. Set continue on error (it will error if you already have the group on your machine) – Recommend NOT deleting when done, but leaving for all future upgrades.  I had issues when I deleted it and recreated it, the policy didn’t take on the recreated group even with the same name.
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    3. I had considered having an AD Group of all Domain Users (that were not admin accounts), but then you have one more group to keep manage in AD, so I decided against that. – that’s my greyed out step. - Note, added section at the end to show I had did set this up.
  2. Add Accounts to DenyLogonLocally – This will grab all of the accounts that have logged onto the machine, and populate them into the local group (You can specify accounts you don’t want included)
    1. Code: (Copy and paste it all, it is just one long line of code, thanks Keith) - Change the -notmatch area with your tech accounts

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      Here shows the group after the script has run, both accounts garytown & cmadmin have logged on to this machine, but only garytown has been added.
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  3. Remove Deny Logon Locally Group Membership – placed near the end in your clean up section, and in the roll back section, so if the upgrade fails, it will remove the users from that group, allowing them to log on again
    1. Code:

      clip_image001[23]

Note, do NOT kill the winlogon.exe after the setup.exe phase, bad things happen.. like it stops your TS (No errors thrown).
In the image above, you can see the "Stop Process -Name Winlogon" Step, disable / delete that.
You honestly don't need it after the setup.exe anyway, rest of the TS will be visible to your users.  After you delete the keys and clean up the images, everything will go back to how it was before once the system reboots at the end of the TS.

Hopefully this is helpful for you, not saying it’s the best or only, I’ve seen a lot of people blogging about similar things during an OSD TS, but I haven’t found much for in-place upgrade TS, so I’ve posted this.

NOTE: Sometimes the Lock Screen is buggy not showing the Lock Screen image, I’ve seen this on countless tests, I believe it is a known bug, so hopefully this gets resolved in the future.  In my last test, I changed the Background after the setup stage, but it just stayed a solid color blue, didn’t actually load the background.  This is why it’s great if you can prevent logon until the TS is complete.

I’ve also been considering removing the default “Upgrade Operating System” step with a run command line step and remove the /quiet switch.  If we don’t want users logged on, then having the UI display will assist with getting them to no be logged on, right?  Well, I still have to test this idea, if it pans out, I’ll share.

Updated 9/18 to show adding a domain group to control lock out.

In Active Directory, I created a group "DenyLogonLocallyTemp" and added all of the user accounts that I want to deny access.  This is where nested groups would be best.  Just make sure you don't have any of the tech / admin accounts in any of those groups.

Above shows the Machine after the steps "Add Domain Deny Group to Local" & "Add Accounts to DenyLogonLocally" have both run.  The Domain group was added by the first step, and the individual user by the second.  This is for demo purposes, you can pick one or the other, or both, depending on your scenarios.

Step: net localgroup DenyLogonLocally / add DOMAIN\DenyLogonLocallyTemp

Update 2017.09.26 - Update to use Local Group Policy:
using secedit.exe, we can import an inf file for this policy.  The issue I had run into, secedit uses the SID of the user group, not the display name, and if you make a local account, the SID will be different on each machine, so I need a way to dynamically update the inf file with the correct SID.  So I came up with the idea of having a script that would create the local group, grab the SID, build the inf file from scratch, and use the SID of the newly created group.  Then the script runs secedit with the contents of the inf file. (Thanks to Keith again for the assist on creating the Code).
Replace Create Local Group DenyLogonLocally with a new PowerShell Script Step:

 

Condensed Video of Progress:

Win10 Build Updates–Persistent Tweaks

CONTEXT: (Feel free to skip my babbling)
If you haven’t figured out by now, I hate managing things that I feel should manage themselves.  If I can get out of doing extra work, and have things in place to automatically take care of it, awesome.  Even if it’s less efficient on network resources, and I lose some granularity of control, if my environment doesn’t care, then I’m going to let things auto update, and auto remediate as much as possible.  (Note, where I work now, I don’t follow my personal philosophy, my environment cares, everything is controls to super granular levels, but we have people to manage it here, at my last place, it was just a couple of us doing everything, so we had to employ methods to do things with out technicians having to get involved.)

IDEA:
Make Windows 10 Build Updates easier.  While I love Task Sequences, I don’t want to have to make something complex for a build update that happens every 6 months.  I want windows to update, and I want to keep the customizations I put in during OSD.
From MMS Presentation: Download full Presentation HERE
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HOW:
Tried and True is Group Policy, however, group policy can take a little while to kick back in, and I don’t want to wait, I want the customizations there before the user logs back in, I don’t want the user to know things changed.  I decided to go with good old scheduled tasks and two scripts, (1 batch file & 1 powershell) plus a 3rd script to build the scheduled tasks and copy the files required locally.

Basically, the batch file is a combination of all the system level tweaks crammed into one script, and the powershell file is the “remove default apps” script. Hopefully after 1709, you won’t need to keep removing the AppX packages, I’ve heard they are “fixing” it so that it will honor the appx you’ve removed, and not put them back in, however, they will probably keep adding in new AppX packages that you’ll have to decide if you want to keep or remove, so there is a good chance you’ll have to run a modified version of this script for each build upgrade forever.

Batch File to Create Scheduled Tasks & Copy Required Files to c:\ProgramData:

Powershell Script To Remove Default Apps (Thanks @Geodesicz):

Batch File to Reapply System Level Tweaks:

Once you have those, you’ll need to create the Scheduled Tasks:
I’ve provided the XML files in the download, and the scripts to import them. (At bottom of post)

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First Scheduled Task – Removing Defaults Apps
image imageimage

General: Windows 10 In-Place Upgrade AppRemoval
user account: SYSTEM
Run whether user is logged on or not
Run with highest privileges (Checked)
Configure for: Windows Vista / Server 2008

Trigger: On an Event
Basic: Microsoft-Windows-AppReadiness/Admin
Source: AppReadiness
EventID: 100

Action: Start a Program
Program / Script: powershell.exe
Add arguments: -executionpolicy bypass -file "C:\ProgramData\Win10Upgrade\Windows10Tweaks\RemoveDefaultAppsWin10.ps1"

 

Second Scheduled Task – Reapplying Tweaks / Branding
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General: Windows 10 In-Place Upgrade Tweaks
user account: SYSTEM
Run whether user is logged on or not
Run with highest privileges (Checked)
Configure for: Windows Vista / Server 2008

Trigger: On an Event
Basic: Microsoft-Windows-AppReadiness/Admin
Source: AppReadiness
EventID: 100

Action: Start a Program
Program / Script: C:\ProgramData\Win10Upgrade\Windows10UpgradeTaskFixesScript.cmd

 

Application Contents: (Root)
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Application Contents: (Subdirectory)
1703 folder just contains the Images I used with our 1703 deployment.

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Once you've run the Setup Script or Application, it will create the Scheduled Tasks, and copy the files needed to run after the build update to:

DOWNLOAD Exported Application: https://garytown.com/Downloads/Win10InPlaceUpgradeTweakTasks_files.zip
This contains the raw files, you don’t actually need to import if you don’t want to.

For the Application Model of Win10 Build Upgrade, I had an application with the content source of the extracted ISO:
Install Program: Setup.exe /auto upgrade /DynamicUpdate Enable /showoobe none  (This will download and apply updates, which can take a long time, but recommend you still do this unless you manually update the install.wim file)
Detection Method: Registry: HKLM\SOFTWARE\Micrsoft\Windows NT\CurrentVersion CurrentBuild = 15063 (1703 - Change the Build number to match the Build you're deploying)

Please customize the tweaks for your environment. 🙂

As always… TEST TEST TEST.  As I mentioned in the beginning, I don't use this method any longer due to different requirements at my new employer, so I'm no longer testing and developing this process.
Please note, the Lock Screen Image can be inconsistent, sounds like MS is aware of a bug, and hopefully future builds will fix this, so if your Lock Screen doesn’t always apply right each time you test… call it good enough and move on to the next thing on your list.

 

Update 2017.09.07 - Jason Freeman (@loosusjason) pointed out you can do this with SetupConfig.ini - More info HERE