Help ANTIVIRUS and cannot load WIN2K

Hi all,
:-X ???
I am completely and literally stuck for solution.

I have a virus and when I log into the computer I have a laptop D610 dell, it completely slows down, before i can run any antivirus scan? I have even tried and go via SAFE MODE, and now that is slowing down, I can just bout click on the software to run, but than it simply freezes. I am and dont know what to do here, as I have been told to use various different tools, but what I require is something on a CD or USB drive(pen drive) that when I switch my machine on it starts to fix the error?

I am using WINDOWS 200, and my machine is a DELL D610 Latitude

Please give me any advice or tips, as its getting hard to solve this problem? :‘( :’(

thanks everyone.

:-[

Does this computer has any other antivirus or security program installed?
If you uninstall the antivirus, does it freeze? (do not get connected to Internet without an antivirus).