I recently installed Norton update 2009 (freebie till renewal) on 4/1/09. When I went to defragment with Diskeeper Lite, I got the message:
MMC has detected an error in a snap-in. It is recommended that you shut down and restart MMC. (it also gave the option of running with the error), which I did.
I had also installed ServicePack 3 on 3/9.
I am running Windows XP PRO. Any suggestions?