For some odd reason, I was just playing a game, running at a fine 60 fps, when suddenly it slows to a meager 8 fps. And not just the game has been affected. My whole system has. It no longer plays audio or video files properly, instead it’s skipping alot and making static noises everytime I try and play them. I’ve tried system restoring, Defragging, Disk cleanup, Startup alterations, Registry Cleaning, and no malware, viruses, or anything like that is there, and none of it has worked. I’m at the end of my rope, here. What do I do?
For some odd reason, I was just playing a game, running at a fine 60 fps, when suddenly it slows to a meager 8 fps. And not just the game has been affected. My whole system has. It no longer plays audio or video files properly, instead it’s skipping alot and making static noises everytime I try and play them. I’ve tried system restoring, Defragging, Disk cleanup, Startup alterations, Registry Cleaning, and no malware, viruses, or anything like that is there, and none of it has worked. I’m at the end of my rope, here. What do I do?

EDIT: I’ve only had my com for 6 months, and I haven’t really pushed it all that much. It’s a Vista, with a 3.00 GB RAM, AMD Turion X2 dual-core mobile technology RM70 (2.0 GHz, 1 MB cache), and up to 1408 MB ATI Radeon HD3200 Graphics HyperMemory. Maybe this helps some more.
EDIT: Well, I have over half my memory available, about 81.5 GBs. I’ve already done a registry cleanup, and there`s only 2 programs that start at startup. Used to be 4… Anyway, the only possible thing I think there’s left to do is reinstall Windows. Programs are slower, though. Like I said, my whole system has slowed down. Even when I download something, it`s slower, and I have high-speed internet. Even moving or copying programs to different spots is WAAAAY slower than what it used to be. A while back, I do believe this happenef to me before, but only visual effevts were affected, and not the speed of the com. I think it was cause of ‘Windows Silverlight’. So, I did a system restore, and everything went back to normal. This is different, though.

I’m currently experiencing a really bad virus.

First, I got a Windows Antivirus Pro, but managed to remove it and run Malwarebyte’s Anti Malware. After that, I thought it was all good, but my search results on google started redirecting to other things. Then, I got a Windows Police Pro. I removed the program files and fixed the registry so I could run programs. But there’s still something on my computer. Whenever i try to run an anti spyware or anti malware program, it halts abruptly and then I can’t open it at all. Also, my registry cleaner had the same problem. They all failed when they got to a cirtain part of the registry. AVG got through the registry without failing. I also have some suspicious processes:

msiexec.exe
mscorsvw.exe
b.exe

Also, when I was playing a game, I noticed a whole bunch of clicking sounds, as if the web browser went to another page. There was no web browser running at the time though.

Can anyone help?
Some more details:

I’ve tried SuperAntiSpyware and it won’t work. It always stops and crashes, even in safe mode.

For some reason, All my system restore points are gone.