I've had some weird issues with my pc since yesterday. I can't use any other browser than IE because Firefox and Chrome just freeze when I try to open a website and I get errors from some programs like WinRaR This is what the errors are mainly saying I've restarted my pc a couple times and I've run Avast antivirus as well and it didn't spot anything wrong.
Your temporary folder is borked. Check that its not read-only, and check that you dont have any corrupt sectors on the HDD. (Computer, right click your C: drive, properties, tools, error checking, and schedule for next boot)