Computer gone slow! what do i do! please help. videos aren't played as fast as before?

[T J]

If what John suggested isn't the case (you have unlimited internet), then it sounds like it could be a virus or some other type of malware. Try checking your computer with a good antivirus and an antimalware program. If you don't have any favorites, I'd recommend Avast or Auslogics Antivirus to check for viruses and Malwarebytes to check for malware. Hope it helps. Good luck!