Well i tryed that once before and i actually lost access to other data i had on my hard drive, games and stuff.
I figured since Avast doest clean your registry, id take a look in to some things and see what i could do. The taskbar issue i actually fixed, but now i just noticed this morning that i seem to be locked out of changing my background picture.
I know this is off topic but i tryed to delet this particular file from within "Tempory Internet Files" and for some reason i couldnt, so i tryed to delet it from the command prompt "cmd" and it said it couldnt find the file.