For some reason, no matter what search engine I seem to use lately, whenever I click on the results, I get a page coming up saying
"This web site at c.ppcxml.net has been reported as an attack site and has been blocked based on your security preferences".
Obviously, this "c.ppcxml.net" page is NOT the page that I have selected - but 9 out of 10 times that I select a web page to look at (even if it is a well known one like amazon or something), I get this same message up. I have tried all sorts of anti spy ware - including Spybot, Spyware Blaster, Malwarebytes and SUPERAntispyware - and they never come up showing any viruses in my system - but I just don't get why this weird warning page keeps coming up when its clearly nothing to do with the kind of page I am trying to select.
Having opened the Firefox folder and the extensions file within etc, I had no file called overlay.xul in my content folder so couldn't follow those instructions - but there was one instruction under that one saying to delete 2 files "fficext" and "fficext.xul" which I have done. So far its still doing it :-(
The anti malware programmes you used are not anti virus programmes. I suggest you google Avast 4 or AVG and if you don't have either then download only one of them, not both. Then update the one you've got and run it in deep scan. It'll take a while but may be worth it. My personal preference is Avast4 . Good luck mate.