Possible spyware

[#1]

Hi Everyone
I keep getting odd instances when browsing, i can be reading a page i have gone to and my browser will suddenly kick in and take me to an advertisement page for Love Film or E Bay quite reputable advertisers not customers of spyware (or maybe they are) but i didnt touch anything to be directed there Love Film is not even a site i have ever been on which is very annoying.I have run Spybot with current updates Nothing Found ? Run full version of Malwarebytes Nothing Found ? Run AVG 9 Nothing found ? The only thing i did recently was upgraded Firefox could that be the problem has anyone else come across this problem or can anyone recommend a good Anti Spyware although i thought the three i had were the better ones. The strange thing is this seems to happen when i first run Firefox and then very occasionaly. Any advise gratefully received. Many Thanks Mike  

[#2]

You could try running this http://www.superantispyware.com/download.html but I would also suggest installing this addon for Firefox as it may stop it http://adblockplus.org/en/installation

[#3]

Hi Thanks
Should have mentioned i have the ad blocker on Firefox as well but will try the spyware you recommend Many Thanks

[#4]

Thanks oldjim
Tried superantispyware and it found 12 possible spyware problems that Spybot and Malwarebytes had completely missed
seems to have stopped the problem so heres hoping
Many Thanks again
Mike

[#5]

Try "Ad-Aware", you can download the free version here http://www.lavasoft.com