Stop Windows Defender.

[BrotherRaphael]

I can't stop Windows Defender. I opted out of the autoscan but still runs. I
exit but it will not stop until full scan.

 

[PvdG42]

I can't stop Windows Defender. I opted out of the autoscan but still runs.
I
exit but it will not stop until full scan.

Wrong discussion group. This group is for .NET Framework issues.
For Defender ?'s, try:

http://www.microsoft.com/windows/products/winfamily/defender/support.mspx

While you're here...
Have you tried Tools->Options to change settings so there will be no
automatic scanning?