firewall aint the reason,i did shut it down and tried to update it but it just did not do anything,i did even download the update from the site and tried to manually update it but it did show some error message and did not update it
i did send that error message to avast staff.
no reply yet.
but anyway i have repaired my windows 2000 and ill try it again soon.
i did shut avast by using task manager and then tried to uninstall it but nothing did happend.
i was too lazy to do anything else and just putted my 2000 cd in and repaired whole windows.
perhaps my windows 2000 was messed or so,but if it wont update when i try it again then..i dont really know whats the matter.

btw.. this was the error msg what did pop in when i tried to update it manually
error
installer program is currently used by another process,try again later,please.