I have a friend whos dell is full of viruses I rolled back the system to the earliest date and it still wont help ,I was told if you erace the hard drive and re install it would be better than if you just re run the program .Any advice ?

so my computer was running slow so i put in the recovery disk and it made a new profile for me but the old one is still on there with the virus and now my computer runs really really slow? how do i clean off the old users with the viruses on it ?

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.

My broadband speed is 2Mbps but my download speed rarely goes above 4 KBps(yes it’s "KBps"-kilobytes per second
not kbps) on downloading simple softwares from net. Can u help in some pc tweaks or a software which will speed up my broadband???
It took me more than half hour to download Google toolbar.This Yahoo! answers page itself took more than 13 mins to open in mozilla firefox with fasterfox extension. I have done defragmentation with Auslogics disk defrag, i have cleaned my registry and junk file also but nothin helps. my computer completely free of Viruses and spyware as I’ve scanned with NOD 32 Antivirus & SuperAntispyware and also Spyware doctor & cleaned all malware but still no change.

there are a number of viruses on this computer and i need them clean up. a.s.a.p.