XP - RPC errors.

Quick rundown, every 36 uptime hours, RPC decides close on me.('The Remote Procedure Call (RPC) service terminated unexpectedly.  It has done this 1 time(s). ...Event ID: 7034'-Event viewer). Did a clean install 5 weeks ago because the problem plagued my old install, and it's back. Other symptoms after the crash include, limited networking capabilities, inability to copy and paste, and inability to drag and drop icons. Done a deep system scan with Avast! and malware scans with SpybotS&D.
WinXP Professional 5.1 Service Pack 2 (Build #2600)

Any know what might be wrong?
[in before XP, fail, an hero]

>>8
'I did a scan specifically for the blaster worm'

http://www.symantec.com/security_response/writeup.jsp?docid=2003-081119-5051-99

SPECIFICALLY, also did not state that I used Avast for that scan.

'AVAST IS LESS WELL KNOWN THAN NORTON, AVG OR MCAFEE AND THEREFORE LIKELY HAS FEWER VIRII WITH RESISTANCES TO IT.'

Isn't it better that fewer viruses have resistance to it?