What way you tried, exactly? Because @vIs^♚ gave you some ways.
Anyway, boot your PC into Microsoft’s Safe Mode. In this mode, will be loaded only minimum required programs and services. Then download/install malware scanners, the most prefered software is Malwarebytes. You will get help under the plan that you choose. If you do not have the opportunity for a purchase then you have 2 options as trial or free.
Additional anti-malware: AppRemover, AhnLab, Avast, AVG, Avira, BitDefender, BullGuard, Comodo, DrWeb, Kaspersky, eScan, ESET NOD32, McAfee and more.
If you will not have any improvement, I will suggest to save important files and format your computer.