Hi, I'm new here, so I probably won't be giving much useful information.
So, I've been using my PC for about a year now with little to no issues with viruses, but a few days ago I started dropping frames in every game I would play, but the moment I opened Task Manager, my game went back to normal. Around 5 or so minutes would pass, and then Task Manager would close without any warning at all. Today I searched up solutions but couldn't find anything that worked. I couldn't find igfxupdate.exe in SysWOW64 or System32, and the same thing that happened to Task Manager happened to Process Explorer. Also, the same day that all of that happened, I can't open Malwarebytes. I just get a message on my screen saying "The item referred to by this shortcut cannot be accessed. You may not have the appropriate permissions." I've never had a problem using Malwarebytes before, and I suspect it's related to the above problems.
Any help is much appreciated.