Binaryalchemist gave you some good advice. There was an issue with my dad's desktop and I talked to a friend (BS in Computer Science) and he had me install and run Malwarebytes Anti-Malware in safe mode and it fixed the issue. I also installed and ran Glary Utilities, which is a registry cleaner/fixer/etc. I don't know if you're able to do any of those, but they might help you. The only other thing I can think of if nothing else has worked would be to do a full reinstallation of whatever Windows you're using. I hope it gets fixed soon!~Sophia