Error when opening the Diagnostic Console: ClassFactory cannot supply requested class
Source: 004AE435 (Spotlight.000AD435)
This error has been found when the server has previously had Spotlight on Exchange installed, and then installed Spotlight on Messaging.
If Spotlight on Exchange was installed before the upgrade to Spotlight on Messaging:
Open Windows registry and remove the following registry keys.
1. Start - Run - Type CMD
2. Navigate and delete: