I have a good anti-virus and registry cleaner and i have no viruses. I have recently installed some more RAM but my computer is still a bit sluggish. It is a fairly new model and i was wondering if you have any tips to speed it up?

This has happened before but it was always related to software. I have put no new software on. I have done a diagnostic and it says everything is ok. This is a Dell Inspiron 9300. My anti virus says no viruses and my spysweeper says no spyware. I did get a message a couple of days ago from my antivirus that said it had quarrantined something that could possibly be a virus. I deleted it and scans since then come up clear. I am also getting a message from my fire wall that says something about ICMP Echo Request (‘Ping’) from (IP addy) and it’s blocking it. Any ideas?
I use avg antivirus, spysweeper, and zone alarm firewall.

My computer is full of viruses and I downloaded avira and zonealarm but I still get trojans every time I start up. A friend told me that I should re-install windows xp and this would fix it, however when I try to UNinstall the xp that’s on there on safemode command prompt it will not let me because I don’t not have the "registry information." However, I believe this would be impossible to obtain seeing as I bought the IBM used! I clearly don’t know very much about this but is there any other way to uninstall windows xp or can I just install it over the old one (or would the damage stick? ) ?
I don’t care about saving old info I just want a clean computer!

Tips are much appreciated 🙂

I need one bad becuase my computer i screwing up and my dad thinks i play to many games thats why its slow but i know its the registry please help.
P.S. It need to be free and clean of spyware, viruses, and etc.

I am using a multi boot system with WINXP and Ubuntu 7.04. My windows is badly infected with viruses and I have tried many anti-virus software. The all fail to remove the virus. the virus is slowly choking my system to death. Its changing the security policy so i cannot open network connections and stuff. and changing the policy back doesnt help either. I can see that my kernal32.dll shell32.dll and some other system files are infected. should i just delete these files and try a repair with WinXP? If i really need a clean install, the GRUB is lost. Is there a way to restore the GRUB then?