I would suggest you buy yourself some sort of Anti-Virus program & a firewall if you dont already have one [ if your budget will allow, otherwise just the Anti-Virus ].
I could run Halo 10x over, but that is besides the point. I recommend you look into a new processor, 950mhz is below standards nowadays. You can get a 1.6 Ghz P4 or Celeron for about 50-100 bucks. You can also get a 128MB PCI/AGP Vid card for about 70-120 bucks. You can basically double your comps performance for about $200.