Theuptodatesafety.net as homepage and other viruses?

i seem to have just gotten a bunch of viruses on my computer, including one that redirects my homepage to theuptodatesafety.net when it's supposed to be yahoo, saying stuff like how i need to install all this adware stuff. i've been trying to look up info about it and i've also been trying to do as many scans as i can but they don't seem to help this. i also get ''cannot find server'' links to www.404dnserror.net with a little bar that comes up saying ''The page you are looking for is probably blocked by adware/spyware on your PC. Remore it with System Doctor software. CLICK HERE.''

i also get a security pop up like this like keeps popping up again like, 2 seconds after i close it:

http://i72.photobucket.com/albums/i184/m...

and along with all that, i have gotten a new ''protection bar'' like this:

http://i72.photobucket.com/albums/i184/m...

any help would be very much appreciated! thank you!

Theuptodatesafety.net as homepage and other viruses?anti virus scan

install avg antivirus update it and also install google toolbar it block popups then start computer in safe mode uninstall unwanted softwares fom add/remove and start scanning through avg.

del temp., temp. internet files an cookies folder's contents go through documents and settings folder in c:

Theuptodatesafety.net as homepage and other viruses?ariel