MGADiag.exe flags a Genuine status for OS and Office. However, I get the error in the part of the sections:
System Scan Data-->
Scan: Failed to scan machine. Error:0x800401f3
Cryptography: Complete
Notifications Data-->
Cached Result: N/A
File Exists: No
Version: N/A
WgaTray.exe Signed By: N/A, hr = 0x80070002
WgaLogon.dll Signed By: N/A, hr = 0x80070002
The same installation had worked fine 3-4 weeks (early October 2006) back without SP2 updates. However, I had to reinstall the system for boot block corruption.
Note that the Original OS was XP Prof. I updated it with SP2 (manually with network IT version of service pack download). legitcheckcontrol.dll is version 1.5.530.0. However, I see version 1.5.708.0 (8/7/06) under system32. I also do not see wgatray.exe and wgalogon.dll under system32.. Dont know how this happened...