With or without Avast, you should install free Sp3 upgrade. MS will soon not support Sp2.
UPDATE THIS POST-- i
I DID THE SEQUENCE OF REMOVING AVAST WITH THE AVAST UNINSTALL UTILITY, THEN REINSTALL AND NO RPC ERROR AND I COULD REGISTER MY FREE 1 year membership. BUT-- UPON RESTARTING MY COMPUTER (used it several hours with no problems) AVAST WOULDN'T START, REGISTRATION= 0days to registration expires and THE RPC ERROR RETURNS.
I HAVE NO OTHER SECURITY APPS OF ANY KIND INSTALLED (except Windows Firewall). I've tried everything over 7 days,, I give up, I'm going to download Avast 7 from "Oldapps" and shut off auto updating.
Go to Mar 1st,3013 support article by Asyn , named " RPC error"Re: RPC error
« Reply #3 on: March 01, 2013, 03:07:48 PM »
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If "Microsoft Security Essentials" is installed you will find it listed in the installed programs list in START, CONTROL PANEL, ADD/REMOVE PROGRAMS.
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BELOW IS WHAT I COPIED FROM Asyn article, BUT GO TO HIS POST, I THINK GOING THROUGH HIS PROCEDURE WILL SOLVE YOUR PROBLEM
Quote
1. Download avast! Free Antivirus:
http://files.avast.com/iavs5x/avast_free_antivirus_setup.exe2. Follow instructions:
http://www.avast.com/uninstall-utility (Run this tool for all prior installed avast! versions..!!)
3. Reinstall avast! with the downloaded installer from point 1.
4. Reboot.