If you have an inscription on the desktop that your version of windows is not genuine (this can happen even if you have a licensed windows), it means that you have downloaded and installed update Windows KB971033 (can check out the journal for updates.) Do not attempt to roll back to an earlier date, or manually remove this update - it does not help! Just download the program, run it as administrator and click apply!
OS: Windows 7
Size: 8.67 Mb