SCCM Task Sequence Reinstall User warning.
Reinstall User warning for Task Sequences.
How a Powershell script can be implemented in a TS, to give Users a “last resort” Cancel option,
if the wrong PC is about to be installed…
Inspiration from here, and with guidance from Nickolaj Andersen:
http://www.scconfigmgr.com/2013/10/02/prompt-for-computer-name-during-osd-with-powershell/#comment-53829
First: Build a package
To facilitate this I use a small SCCM package, without a program, containing the Powershell script and ServiceUI.exe.
The content for the package is zipped in ConfirmTScontinue_SCCM_Package_files.zip
Create the package (and remember to Distribute it 🙂 )
In the Task Sequence you need to do 4 things.
- The content of the whole original Task Sequence needs to go in one Group and above that group you add a “Pre-install Check” group.
- In the Pre-install Check group, select “Add”, “General” and “Set task Sequence Variable”
The Task Sequence variable name must be “UserResult” to comply with the Powershell script. Set it to “True” (no brackets)
- Next Add a “Run Command Line” step (i call it “Wait for UserConfirmation“) with the following command:
ServiceUI.exe -process:TSProgressUI.exe %SYSTEMROOT%\System32\WindowsPowerShell\v1.0\powershell.exe -NoProfile -WindowStyle Hidden -ExecutionPolicy Bypass -File ConfirmTScontinue.ps1
(Translation: With the ServiceUI messenger (and within the TS environment) the Powershell script is loaded… – yes, took a while to figure out. And a gain thank you Nickolaj)
a. Select the package
b. and, in TS installing a 64bit OS, you MUST select “Disable 64-bit filesystem redirection”.
– If not, the 32 bit Powershell will be called and nothing is returned to the TS.
As we only need the warning when the TS is starting from within a running Windows (not in a PXE boot scenario) we must also set a condition on when to actually ask:
- Finally we need to use a condition to make the original TS skip, if the variable “UserResult” is set to False:
And that is another way to use a week at work… I hope you will benefit from it, avoiding unexpected reinstalls.
