Hi al968,
I agree with bob3160 here. Heuristics are something for a HIPS program or an Intrusion Detection program. HIPS can be very annoying. FPs can be a real pain in the proverbial behind, because if they are for data that are essential for the functioning of your Operational System, you have a problem.
If you like to check something that runs in the background, that you wanna check upon, use KLDetector (
http://dewasoft.com/privacy/kldetector.htm ) to find keyloggers or other trojaned processes that may run in the background.
Inside the browser you can use the DrWeb anti virus link checker.
If you insist on a heuristical av non-resident solution take F-Prot for DOS aboard, it even comes with an automatic updater now. That is the best heuristical scanner I know about, better then the ones that incorporated it at some time (DrWeb CureIt).
Stay malware free is the wish of,
polonus