An undesirable effect of a PowerShell script task running is that PowerShell 'transcript files' are created on the host where it is executed.
ITMS 8.x
This is an environmental issue as the 'transcript files' are generated from the Powershell command "Start-Transcript", and when run on a host which enables 'transcript files' from every PowerShell session as documented by Microsoft in the following article:
This is likely caused by any of the following scenarios:
1. Configured in the PowerShell Profile
2. Configured in the Group Policy
3. Configured to open PowerShell session with the command on the session start from the Windows Registry
4. Or there is a script in the User's Startup folder using this "Start-Transcript" command
For each of these possibilities, these are the steps to check:
NOTE: For all users use: Invoke-Item "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup"