What modification i can take for faster comp?

[kfir]

Its thinkpad 570.
1. 256mb
2. quick hard disk. I'm thinking of 7200rpm.

Is there anything else i can do?

[AlphaKilo470]

Because of the formfactor and lack of industry standards in notebook computers, upgrading a notebook can be a pain in the [censored] every now and then. Your best bet is to add more RAM, have less applications loading at Windows startup, install a spyware scanner such as Ad Aware or SpySweeper and defrag your hard drive at least 2 times a month.