After a couple of weeks working with Windows 7, a message suddenly appeared during shutdown of my computer:
Waiting for groupmanager.e
Because of my intuitive brain, I guessed groupmanager.e should be read as groupmanager.exe. A quick search on Google Bing (as I’m a Microsoft minded technician :) ) will lead you to hundreds of pages remarking groupmanager.exe to be a trojan horse.
Well, it may come as a surprise to you, but MY groupmanager.exe was a trojan too :) .
If you have the same groupmanager problem: Install an antivirus scanner as soon as possible and get that executable cleaned.
For a free virus scanner, I can advice AVG to you: http://free.avg.com/us-en/download?prd=afg