I have purchase mcafee Total protection 2 months agow but after 2 months my pc damage due to some resion, now i purchase new pc and i want to install it but its says licence already used. please solve this problum
The licensing side of things is all handled by Customer Service linked through McAfee Support link at the top of this page, but they should be able to fix that straight away.
As you are apparently in India you can contact them by online chat (email is too slow) through that link. Pick any Country, it doesn't really matter as long as it's not one of the oriental ones.
If you are using Business products then you have the portal through which to deal with McAfee directly.