How to know if your antispyware detected a false positive?

I recently downloaded spyware terminator….I ran a quick scan and it said i have an invalid start menu item……how do i know if it is a false positive

also………….i think it is a good antispyware and i like the real time feature……….is it good? so far it seems good, I have avira and firefox, will it clash with avira and work with firefox

if u think it is submit it to them or look it up on google—-no avira is great and has no problems with firefox –i used it for a long time till i got kaspersky internet

Free spyware terminator