Applications installed via Task sequence

Question

Hi,
Before my time on SCCM someone previous to me decided to deploy a group of applications using a SCCM Task Sequence. Essentially all this does is install Applications in a certain order. The time has come to uninstall this group of applications. 
I've managed to uninstall everything successfully by deploying each of the applications at a Uninstall Collection with the Uninstall Action. However, if I need to rollback and re-install the task sequence on a machine I have just removed all the applications
from, SCCM seems to think it is still installed?
I can't see any detection method on the Task sequence, and I've cleared the SCCM Cache. The PC is not in the install collection.
Is there something else on the client that tells it what task sequences have been deployed against it?

Answer 1

You might want to run some PowerShell instead then.
The following three commands will force a re-run of a TS
Get-WmiObject -Namespace "root\ccm\scheduler" -Class ccm_scheduler_history | where {$_.ScheduleID -like "*<PackageID of Task Sequence>*"} | ft ScheduleID
Get-WmiObject -Namespace "root\ccm\scheduler" -Class ccm_scheduler_history | where {$_.ScheduleID -like "*<PackageID of Task Sequence>*"} | Remove-WmiObject
Get-Service | where {$_.Name -eq "CCMExec"} | Restart-Service
Obviously set <PackageID of Task Sequence> to the actual PackageID such as 'CMR000A2'
Cheers
Paul | sccmentor.wordpress.com