|randomacessmem - just install 7! (windows 7?) - did you look at his spec.|
neophyte123 - even before this the machine must have been almost impossibly slow! With that processor, but even more importantly only 192MB RAM, xp is only going to choke.
If you've had malware that's compromised windows settings then best bet is to do a fresh install - but I honestly wouldn't bother on that machine (the time & effort...) unless you have no alternative.
One thing you could try (if its working) is system restore to date before the problem started. If the malware has only compromised settings, not removed system files (which is the situation in every case I've fixed), system restore can help. However, be warned, some malware also wrecks system restore!
If you do get it back, make sure your start up list of programs only includes your internet security - and only have one internet security that runs at start up installed (I'd recommend Microsoft's Security Essentials). The program autoruns is good for managing startup list (or there's the built in msconfig of course).