How Can i check if i have a virus or not .. (1 Viewer)

Hi guys,

i think all of us have seen this once in a while ... it's really driving me crazy ...:dazed:

i have norton antivirus 03 .. and from time to time, i have an alarm that says i have a virus in one of my folders .. usually, the virus has a W32 as its name ...

anyway, when i check my files .. i can't find the subfolder that contains the virus ...

i scanned my PC w/ 3 antrivirus programs, neither one could find one ..

so, is there anyway i can check if my computer truely has a virus .. beside how can i find it ..

finally,

CAN anyone tell me where can i put the serial number in norton's products ...