The first thing to do is to download and run this little bit of Free Software Belarc Advisor. It will tell you all about your PC.
Who made it. What it's Operating System is. What Processor it has. How much RAM is installed. What Graphics Card, if any, is installed.
Save that, possibly Print it out, and then you can tell us those things that I have asked. Armed with that information we should be able to give you a guide as to what it's potential is and what you may need to do to improve it's capabilities.