I am in BIG Trouble….

Hi Friends…

I run cyber cafe, I have 15 PC. out of 15 I have installed XP professional on my 12 PC but only 10 are running fine.. my 2 pc giving me problem. they restart every 1 or 2 mins.

all my pc are 3 yrs old, configuration is
Intel celeron 633mhz with 20GB HDD and 128 MB Ram
Intel 810E Tomato Board

I wish install XP pro on my all pc since it work faster.

How can i solve my restart problem. before install XP ther was Windows Me on it.

I did clean installation of XP. re-creating new partition divided into 4 parts 20GB into(C:\, D:\,E:\,F:\)

how can i solve my restart problem.

Help me..