Alikhan
10
So that means it’s not an infected version of taskmgr (or a modified one),
This is odd…
You mentioned your windows updates updates not working correctly but even if that were to be the case, it wouldn’t disable avast!.
Could you check in device manager if any avast! drivers have a yellow triangle… you may need to go to view>show hidden devices and look at non-plug and play drivers
Could you check in Task Scheduler (should be in Administrative Tools in XP) if there is anything related to avast! OTHER than avast! emergency update?