You receive a "0x80070020 The process cannot access the file because it is
being used by another process" error message when you try to download an
update from Windows Update or from Microsoft Update:
Did you have another anti-virus application installed before you installed
or upgraded to Norton 360? If so, did you uninstall it via Add/Remove
Programs (even if it was another Norton application) and then run the
appropriate removal tool *before* you installed Norton 360?
Norton Removal Tool
McAfee Consumer Products Removal Tool
Alwil (Avast) Software Removal Utility
The above notwithstanding:
1. After making certain you have a copy of your Product Key, uninstall any
Norton software listed in & via Add/Remove Programs.
2. Enable the Windows Firewall!!!
3. Run this removal tool:
4. Reboot and /immediately/ install the 30-day free trial version of, e.g.,
NOD32* or KAV7**
5. Manually update your new anti-virus application then run a full system
Do your problems persist now?
[Don't forget to subscribe to your new AV app or uninstall it then reinstall
the Norton application before the free-trial period expires! Should you
decide to reinstall the Norton application, I recommend not installing any
Norton Add-ons for a while.]
~Robear Dyer (PA Bear)
MS MVP-IE, Mail, Security, Windows Desktop Experience - since 2002
AumHa VSOP & Admin http://aumha.net
> Can anyone PLEASE help me with this issue!!!! I have Windows Vista Home
> Premium and recently received the following updates: KB946026, KB938371,
> KB905866, KB943899, KB946456, KB943302, KB943055, KB944533. After
> downloading and restarting, the update history shows they failed to
> due to error code 80070020. I have looked up the error code revealing
> process cannot access the file because it is being used by another
> I have also learned that this is normally caused by spyware or virus
> scanning programs.
> I have Windows Defender and Norton 360 and I completely disabled both
> systems including firewalls but still can not effect the updates
> successfully. Does anyone know what else I can do??????? By the way keep
> it in simple terms, I know just enough to be dangerous with these things.