Listen to this weird little probelm that just happned to me

I have a computer 2.8ghz P4 XP pro and 1.5gb of ram. I turned on the PC and it startes up Windows XP and once it got ot the welcome screen it wouldn't go any farther. I could hear the computer still loading up but my screen just stayed at the Welcom screen. So after a couple restarts and going into safe mode once, I fired up another PC on my network to post the problem here. So while I turned that one on, I turned the PC that had been causing problems on, and sure enough it went all the way to the desktop.

A person that uses this computer of mine told me that he had the same problem last week. The computer wouldn't go past the welcome screen untill the other computer on the network was turned on.

Also when I booted into safe mode I couldn't get the internet connection to work. I couldn't even connect to my router through my browser.

This is a very strange problem to mel. Maybe somebody here has had a similiar problem.

btw: I'm using a Nvidia Gforce 4 TI420 8x graphics card.