Serenity,
It seems you must be having problems with your system. Although it may be old, it may be salvaged for a year or 2 with basic cleanup,video card, ram and/or power supply. You may not need all of these but let us know what you are running.
Post your computer specs in this forum. I used to run Aces high on Athalon 3000 overclocked to 1.9 ghz with a Nvidea 6800GS(agp) and had no problems. My computer was lean with 16 processes running. Mind you I had graphics in game low but I only ran into slight screen lag in high
traffic areas.
The guys will help you get your existing system running real nice depending how outdated it is. Do not run and get a new computer if you do not have the cash. For $350 or much less, the guys and myself will give you great advice and suggestions to get you up and running nicely.
Go to start/run and type dxdiag in the run box. Save the information and open it in wordpad. Copy the notes and paste them on this thread. Skuzzy,MrRip, BaldEagle, Challenge, Floatsom myself and others will help. I am not an IT pro but have built my second computer and have SOME knowledge. None the less, These guys are pros and we will get ya up!