can't start resident protection

I am running avast on xp professional. The initial problem was that I could not start the resident protection automatically on start up. I uninstalled deleted directory and cleared temp files. The present situation is that none OT the tasks will start. I get no message when trying to start resident protection but when I try more details and start each individual task the message ‘requested resident task was not found’ appears. Can someone help?

Do you use any other antivirus in your computer?

RPC error is generally related to other antivirus present or, at least, firewall blocking.
RPC error may also be because of avast! services being stopped.
Anyway, RPC error is most likely correct by this procedure:
Go to Control Panel > Add/Remove programs > avast! antivirus > Remove. Then choose Repair function in the popup window (Repair). You must be connected to the internet while repairing.

If this does not help, can you uninstall / boot / install / boot again?

I have tried both of these but to no avail. I still have the same problem.

What if you start the main avast interface (and maybe start an on-demand scan)?
Do you get any error messages?

Thanks
Vlk

I have found norton anti virus on my system which I did not know I had. Maybe this is the problem

That is quite possible as even when uninstalled a lot of stuff gets left behind (registry entries, etc).

Check out these links for the relevant version, it may help to remove the remains.
The NAV 2003 removal tool can be downloaded here: ftp://ftp.symantec.com/misc/consumer/Rnav2003.exe
Manual Removal NAV 2004 - Manual Removal NAV 2004
Manual Removal NAV 2003 or earlier - Manual Removal NAV 2003 or earlier