Which antivirus programs have you tried?
Try the free AVG 7.5:
http://www.download.com/AVG-Anti-Vir...-10645435.html
Be sure to opt out of installing the email scanning module.
Gary VanderMolen
"hemant" <hemant@discussions.microsoft.com> wrote in message news:2B546B29-0551-4551-B274-AA2398ED214B@microsoft.com...
>i am not able to install antivirus in windows vista can someboby help me