after reinstalled avast, problem is…same…
avast cant delete viruses when it found them in my mails…
…avast cant find where are files… ???
and avast work work & work…and i wait wait &wait…very long time before receiving other mails…
always same message in administraton tools/event of my windows xp :

"AAVM - scanning error: ClientRqDispatchThread: OpenEventsAndMapping failed - client probably died, 00000159. "