It is highly advised that you don't download any software or myprog.exe file from the Internet in order to fix this problem. By doing this, you might infect your computer with malware, Trojans and viruses.
There are several things that you can try. I suggest you update your OS with the latest updates. By doing this, some corrupted files might be replaced. Also, try to visit the following website and use the utility that Microsoft is providing. Further, try to download and use Malwarebytes to be sure that your computer is clean. If none of this is working, try using the Windows repair utility. Visit the following website to learn more about this matter.