We need to see what is on that BSOD.
Give this a whirl:
Can you supply the make and model?
Do you know if you have XP Home or Pro and what the Service Pack is (SP2, SP3)?
Have any hardware oriented changes been made to the system since it worked? RAM, video card,
storage (hard disks, USB devices), hardware drivers, device drivers?
If you can only boot in Safe Mode and are seeing a BSOD, choose the option:
Disable automatic restart on system failure
Then you can see the BSOD.
Here are some BSOD blue screen of death examples showing information you need to provide:http://www.codinghorror.com/blog/images/Windows_XP_BSOD.pnghttp://techrepublic.com.com/i/tr/downloads/images/bsod_a.jpg
Send the information pointed to with the red arrows (3-4 lines total). Skip
the boring text unless it looks important to you. We know what a BSOD looks
like, we need to know the other information that is specific to your BSOD.