Hello,
i have msg like "This copy of windows is not genuine" ,so plz tell me is that my os is copy write some one,becoz it will install by other person
W7 will show that message if it is pirated as scout and jsc said above.
It will also show that message if it has not yet been activated. Have you tried to activate it? You could try doing so by the internet or by telephone.
Seriously though, if you are getting the pirated copy message after you have activated Windows or if it refuses to activate, you can call Microsoft using the number that is offered for calling to activate. If you are in fact the only user of that windows copy simply tell the operator that you are the only user. If its a pirated copy you are on your own and should in fact go out and get a legal copy of windows. We all had too. Lol