worms riggling in your computer?...

I think you can backup all your useful data in usb or movable drive.Then format your drive,this is a little cruel but it will clean your computer thoroughly.Then you can restore your data to the computer but remember scan your usb or removable drive which holds your data at first.Then you need higher standard of security for your newly-installed system.For example,you can install Kavasky as an anti-virus and comodo as firewall.You can also use Returnil or Powershaow to protect your system from viruses.I also suggest you have a try on open source opearating systems such as linux-ubuntu-for example is one of the best choice,they are much more immunize to common viruses which is targeted to attack windows OS."