Laptop performance slow..

I've been using this laptop for about 3-4 years now. It's a Sony FRV25. When i first bought it at 2003 Best Buy, i could even play warcraft 3 of this PC. It ran like a charm.

now 3 years later, it's becoming very very slow.

Loading windows is fine, but everything after that is slugglish. I've been able to put up with it (good way to train my patience) but would really prefer if it's faster.

i've sent it to repair the PC fan before, but i'm not sure if they did a good job or not. Not much diff now and before.

My laptop Specs are

P4 2.66
1gb Ram
40GB hdd (with about 33% freespace)
Onboard videocard.

To test my laptop cpu temp, i use SpeedFan. I'm pretty Noob at this actually so i'll just give the numbers.

Fan1 : 0RPM, Fan2 : 0RPM
HD0 : 56C, Temp1 : 73C

I know my pc is hot, and i've heard a hot cpu would cause the pc to slowdown.. But which is my cpu temp? and how do i check it accurately?

Most of all.. how do i improve my Laptop performance. I can't even Use firefox + winamp + windows media player at the same time now. (yeah i do that sometimes.. don't ask why )

thx for the reply. I'll check out majorgeeks.com

i ran hijackthis on my pc. all clean. my current amount of processes is 47, it never goes above 50.

Hijackthis is clean so don't htink there's any trojan,virus and such.

Yup, i'm using AVGfree for AV, the things that are running in the background are the things i need.. everything else is turned off.

Can anyone recommend what utility to test my PC performance? Not graphics but processing power.