OPC FAQ

Problem: When trying to configure DCOM components within DCOMCNFG, Windows issues the following DCOM configuration warning:

The CLSID {1F87137D-0E7C-44d5-8C73-4EFFB68962F2}, item C:\WINDOWS\System32\wbem\wmiprvse.exe and title Microsoft WMI Provider Subsystem Secured Host has the named value AppID, but is not recorded under \\HKEY_CLASSES_ROOT\AppId. Do you wish to record it?

Cause: In Windows XP, the most common cause of this problem is the following Windows Update:
Security Update for Windows XP (KB956572)
Unfortunately, this update is only valid on Windows 2003 (as per Microsoft's documentation). Adding to the complexity, not all Windows XP installations are affected by this update.

Notes:

• Clicking the "Yes" or "No" buttons does not solve the problem
• This is NOT caused by a disk drive corruption or failure
• You do NOT need to reformat your computer

Suggested action: Uninstall "Security Update for Windows XP (KB956572)". However, if you are already in the process of reinstalling Windows, simply ensure you do not apply this update.