How should i upgrade my pc? plz also mention which products should i use?

to upgrade your processor you have to do a bit of research on what processor is compatible with your motherboard so you have to find out first what type of motherboard you have. For your ram, determine how many slots you have..try upgrading to 4gb if not at least 2gb. And finally for your video card, you should try to upgrade to a higher memory like radeon 5770 1024mb but be sure that your power supply meets the recommended power for the video card you choose....