Make Windows 7 genuine using Command Prompt

Step 1: Open command prompt as Administrator. To do this Type Cmd in the start-menu, then right-click on Cmd and click Run as Administrator
Step 2: Now in the cmd windows type“SLMGR –REARM”
Step 3:Press Enter and wait till it executes
Step 4:Now a dialogue message box will appear asking you to restart your system. Click Ok to restart your system.
Step 5:That’s it. When you restart your system you’ll not be annoyed with “ Not genuine error” anymore