I am not a basketball fan myself, but if you want a better PC performance, then the one you have is pretty useless - it is great for normal everyday PC use but NOT for gaming.
You should get another PC which has a dedicated Graphics card and more RAM, your 1Gb RAM is quite poor by today's standards. Also make sure that your new PC has the latest Codecs installed - you can find out more information about Codecs on Google!
You should also have at least Win7 as the Operating System (OS), this is because any earlier OS will not accept more than 4Gb RAM, with Win7 you can have 8Gb RAM.
Good luck - I hope your budget can stand the extra cost!