Dual-System windows and linux cause me to crash and send an error

The dual-System windows and linux cause me to crash and send an error-Linux general technology-Linux technology and application information. The following is a detailed description. 1. Windows XP and linux
2. It will be useless in a few days. After you open your computer, you will find that Windows XP and linux cannot go in.
3. If you want to re-convert the system, you can put the system disk on the computer, but the CD is as follows:
Window setup
========================================================== ===
As soon as you enter this place, it will become stuck. After a period of running, it will become stuck, and the prompt will become blank.
The format is useless.
4. I had to mount the disk to another computer and put it in the disk management of window.
5. Find a ghost disk, and a system of ghost goes.
6. The following screen is displayed when it is started:
GRUB version 0.93 (639 k lower/522384 k upper memory)
[Minimal BASH-like line editing is suooorted. For the first word, TAB lists possible command completions. Anywhere else TAB lists the possible completons of a device/filename.]
Grub>
7. I don't know how to use this grub, but I am prompted to use fdisk/mbr in DOS (to fix the boot partition.
8. Then, when the system is being restarted, a cursor will not be able to enter the system in the flash.

I'm depressed. I can't help it now. Do you have any tricks? Please reply.
Thank you!