Computer Virus Problem?? What can i do?

Do NOT follow the link from Sandeep. This is a link to a spyware infected site, they are trying to trash your machine. Download the full free scanner from a href="http://malwarebytes.org." rel="nofollow"http://malwarebytes.org./a Run a full scan. Then use the fix all items option, and when it asks for a restart do so immediately to prevent any re-infection. Avira is not good lately. And if you get repeated warnings it is often coming from a site you use regularly. Infected sites pushing downloads on you will invariably get past an active anti-spyware/virus. Malwarebytes scanner will get rid of any of them. David Lisah is also pushing infected software