Hello,
thank you for reporting this issue. We're aware of it and we suspect one of Windows security updates from August 11, 2015 as a cause (most likely KB3078601), but we can't confirm or disprove it at this time.

Hi, so what now? i need reinstal windows or what?

You can uninstall the update (http://windows.microsoft.com/en-us/windows/remove-update#1TC=windows-7) or wait for Microsoft to fix it.