Hi
Thanks AndrewLJones2000, your solution worked perfectly and I now have complete access to users sessions.
The instructions to be able to replace the old files are as follows: (Always create a restore point before doing this)
Windows security needs a little massaging to allow you to modify the original file, found in C:\Windows\System32, so....
1.Click Start, then type "cmd" in the search box & hit enter. This will launch the Command prompt
2.Type the following & hit enter: takeown /f C:\Windows\System32\FILENAME
3.Then type this & hit enter (NOTE: Replace USERNAME with YOUR USERNAME!! If your name has a space in it, enclose it with quotes, like "Mike Garcen")
cacls C:\Windows\System32\FILENAME /G USERNAME:F
4.Then go to your Windows Explorer, and go to C:\Windows\System32 and C:\Windows\System32\en-us
5.Rename the original FILENAMES to something else, like "FILENAME.ORIGINAL", just in case
6.*NOTE* If you are unable to do the above, try rebooting into SAFE MODE
7.Then copy & paste the FILEs you downloaded in Step 1 into the appropriate folders
8.And voila!
Files to fix for Terminal Server Workstation logon
C:\Windows\System32\mstc.exe
C:\Windows\System32\mstscax.dll
C:\Windows\System32\en-US\mstc.exe
C:\Windows\System32\en-US\mstscax.dll