evilgenius134 :
You cannot upgrade the CPU on a laptop.
To get better performance you must purchase a brand new laptop.
Not true you can upgrade a processor on a Laptop I have done a few, but it usually is not worth it. The thinkpad you have was available with a few different processors.
Intel Mobile Pentium M at 1.3GHz, 1.4GHz, and 1.5GHz
Intel Mobile Pentium 4 at 1.8, 1.9, 2.0, 2.2 or 2.4GHz
Looks like you could upgrade to the Pentium 4 2.4GHz but you will not see really any improvement since they are all too old to be relevant upgrades best bet is to just buy a new laptop.