Here is some info on Windows Defender and Vista repair/re-install.
You will need to scroll down a bit to get to the fix, it didn't come from Microsoft of course.
Don't know hoe relevant it is at this point, but just wanted to throw it out there. I didn't look back through the entire thread again, so if it was already mention....my apologies.
http://answers.microsoft.com/en-us/...r-wvista/32fddb1c-1d24-408c-aa8f-0ac82baa237a
I am going to try this over the weekend thanks!!