The system was checked 4 times in the last week. All files and folders and as far as Avast says its clean however it was Avast that was showing virus threats to begin with so we were puzzled as well.
Then, while surfing, we had run into many other sites which brought the same warnings. At this point, I think its to do with sensitivity levels of virus detectors. Based on my research, this is a usual and ongoing problem for all anti virus software providers. As you also put it, you get a virus warning one day and not the next or a warning on one pc and not on the other running the exact same virus shield.
At the end of the day, the system looks to be clean...If any further problems, please report to
[email protected] with details of warnings you may receive and the page address you were trying to reach.
Thank you.
Rami