Hi y'all. Posting back here as no longer any new issue to deal with. Seems hole in IE7 after major update 9 Dec through to Microsoft resolve Dec 17 led to incursion of exploits as I was loading web updates to operating systems. But no malware infections. Problem sorted through standard procedures. PC tune-up and protect. Things quiet since. Also, other PC with freshly loaded xp and Dcom exploit alerts fell back into normal Avast protection mode. Now updating per norm. Thorough scan today, clean system.
On weekend, did repair job for client seeming with same IE7 problem but malware infection due to messy PC. Righted PC and no problems since / as yet. Put issue down as IE7 vulnerability now resolved. Moving on. Until next time.
