Recently i have found many viruses on my computer, and did the usual thing of downloading Avg/Avast Anti virus and Constantly scanned my computer hoping to resurrect the problem, as per usual the viruses just kept on coming, it kept changing the DNS so when i open up Google chrome to my homepage it would never load, or it would work for about 15-20 mins until the same Google message appeared saying the DNS Server could not be found, then i had start up issues it look about 10 minutes to start up, and so i kept on doing full computer scans still hoping it could all be solved, now my computer starts up fairly slow, i have tried using safe mode and have downloaded a spyware scanner and put it on a usb stick, But this has been deemed useless simply because when i get to login i cannot use the mouse at all, i know this must be the work of the virus or viruses, i have to my knowledge used every means possible to try and resurrect the issue, Help on this issue will be greatly appreciated.