Script debugging doesn't work

In the interest of moving forward, I went ahead and renamed C:\Program
Files\Common Files\Microsoft Shared\VS7DEBUG\ to C:\Program
Files\Common Files\Microsoft Shared\VS7DEBUG_\ and reinstalled scd10en.exe.
I rebooted and restarted TC. Still no joy on debugging.



I went back to http://www.automatedqa.com/support/viewarticle/8874/
and checked the registry location for

     HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{78A51822-51F4-11D0-8F20-00805F2CD064}\InprocServer32

It  is now

     C:\Users\leal\AppData\Local\Temp\WCU\Program
Files\Common Files\Microsoft Shared\VS7Debug\pdm.dll

I confirmed that the folder exists and ran regsvr32 on pdm.dll and also did mdm.exe /regserver. Still no debugging.

At one point in all this, I saw that the value at

     HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{78A51822-51F4-11D0-8F20-00805F2CD064}\InprocServer32

had shifted to c:\Windows\System32\pdm.dll. However, I wasn't able to reproduce this. When I reboot, it's at the first location (c:\Users\leal\ ...).