I'll try scanning with the two product you suggested. Also note did a scan with spybot and found nothing and the PC OS is xp.
I used the dos mcafee scanner dated last week. Did not think to log the results so just remember it found and cleaned a Trojan from 4 files in the system32 directory structure. They disabled spybot and mcafee, spybot would not start and mcafee would not scan anything. Also modified rights on files and registry and paused the real time scanner. Could not change the realtime scanner and update told me that some files were missing and would not complete. I was in a bit of a hurry to fix this so did not get as much information as I would have liked. I remember all of the files cleaned were system files and that one had something to do with routing or dns. I did run a sfc before the scan to fix system files, but it appears they had something in place to prevent this. Also the stinger found a trojan again did not make a record of the name, but the file infected was the weatherbug exe, had problem with infections from them at home so stopped using it at home. I don't know this was the source for sure!
Thanks again for your advice.