Within the PSM session press the ALT key again to release the key.
Switch the users workstation to Windows Classic look & feel.
WORKAROUND 3 - Configure the workaround to use the old ALT-TAB XP switch method
On the users workaround, load regedit and navigate to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
Create a new DWORD named AltTabSettings set the value to 1
Restart the workstation
Quest Software does not provide support for problems that arise from improper modification of the registry. The Windows registry contains information critical to your computer and applications. Make sure you back up the registry before modifying it. For more information on the Windows Registry Editor and how to back up and restore it, refer to Microsoft Article ID 256986 “Description of the Microsoft Windows registry” at Microsoft Support.
BFER 9733 in regards to the issue with the ALT key staying "stuck" in the psm session when alt+tab is used will be fixed in a future release of TPAM.