im not really good… but when the virus thing pops up, try moving the virus (click move/rename) and try to delete it manually? (Go to C:\Program Files\Alwil Software\Avast 4\Data\Moved then try deleting the virus there… the file up there is like a trail… if your good with comps, then youll know where) i dont know it MIGHT work… well good luck! sorry i couldnt help much