Um ok.
I think this stuff might be coming from a process called
~tmpd.exe.
Second time AVG has said something about it.
Should I end that process?
Also, go to Start>Run, type in msconfig
Go to the Startup tab, and see what is starting up that shouldn't be.
Nothing in that list is necessary for the computer to work, so test to see what it might be.
EDIT: Also, go to the folder that AVG says that warning about, and delete the file it is moaning about.