Have you installed anything lately that could of caused it? like a program you wanted to try?
Because it maybe be a virus/spyware.
But i have encountered the issue before and it was an issue at my ISPs end.
It would't hurt to scan your pc with
Ad Aware (http://www.lavasoft.com/products/ad_aware_free.php)
Spybot S&D (http://www.safer-networking.org/)
I'd also run a clean up/registry cleaner using CCleaner (http://www.ccleaner.com/)
and see if it fixes it![]()





