Logged on today, and got the error message i've attached. Never seen it before. Pretty sure i didn't change anything last night. Where's it come from?

Running:

Acer Aspire 5610 laptop
Windows Media Centre
80gig HDD
Intel Core Duo processor
1gig RAM

Also got a buil in AcerOrbicam. Yesterday tried to open through msn and it worked for about a minute. then stopped. tried again "is in use please close other apps". Tried opening through the software "is in use" then a little while later "a cable is disconnected" It's built in! there's no cables! Also when i tried through msn i heard the little "disconnected" "connected" noise windows makes for the usb ports when you plug something in/take out. Now the camera just has a grey screen when i run it thrugh the acer software.. any ideas?