It all started after I receive System Check virus few days ago. I installed spyhunter and remove the virus completely. I again run a scan and it shows your computer is safe.. But now In firefox, sometimes I got redirected to secure.bidvertiser.com ; searchportal.information.com etc sites.. while trying to open some site through google. (Not for a particular site). I completely removed my Mozilla Firefox from Computer.. Then download it and reinstalled it. So I thought now the virus must have been removed.. But it is not. I run various anti-virus scans.. But they are not showing anything harmful.. I check my host file, hidden files in device manager.. But found nothing like tdss.sys as written on some sites. Guys please help me to get rid of this virus completely.