Tricks : HOW TO FIX WINDOWS 7 NOT GENUINE ERROR 11)Start your PC and click on Start button.
2)Use the search tool over there and search for ‘cmd’.
3)Right click on the ‘cmd’ in search result and choose option ‘Run as administrator’.
4)Now type SLMGR –REARM and hit enter. Type the words as it is otherwise method will not work.
5)Now a popup will appear as Windows Script Host which will notify that you’ve successfully completed         that command and you need to restart your system.
 That’s all.
IN CASE YOU’RE STILL EXPERIENCING THE SAME PROBLEM THEN YOU NEED TO FOLLOW BELOW MENTIONED STEPS,
1)Move into your control panel and then go into the Windows Update section. Alternatively you can move into the ‘Uninstall a program’ tool.
2)Now click on ‘View installed updates’ and wait for all updates to get listed.
3)Now find out update with name ‘KB971033’ and uninstall it from your Windows. 
4)Restart your PC now.
Have Fun !!