Hello,
this is the Temp folder of Windows.
Maybe it is enough to empty out the folder. Go on C:/Windows/Temp and delete everything in the folder, NOT THE FOLDER ITSELF.
When the Problem is still there after that do what is shown in this Topic: http://forum.avast.com/index.php?topic=53253.0
Please ATTACH your Logs, DONT COPY AND PASTE THEM.
After that Malware removers will be notified.