I really need help. Ok, so here's my problem. I have 2009 Emachine Vista computer, my computer was always a bit slow but nothing as major as it is now. I think we have a virus or a Trojan somewhere on our computer because it immediately became super slow like 2 days ago. I thought "well if it's a virus, I'll just download some antivirus programs and antispyware" but it wasn't that simple because everytime I try to install malwarebytes and any other computer program that gets rid of viruses and spyware it will say "Regristy key missing or something like an error" and it does that on any good free virus protection downloads. So it's like I'm screwed because I don't know anything about registry keys, can somebody help me? And tell me what can I do? It's like I'm stuck with a slow computer.
Also, now when I get on youtube the videos will run really really really slow, and sometimes the video will be moving in slow motion, it didn't use to do that so I know I'm dealing with a virus. So the question is "What can I do about this registry key problem and fix it once and for all?" If you know anything about computers PLEASE PLEASE PLEASE write me back immediately it's really frustrating!!