Are you by any chance overclocking anything? That is a memory error obviously, and could be cause by overclocking or failing memory.
Try downloading and running this test, it will test to see if your memory is going bad or not.
Memtest86 is a stand alone program that cannot be executed under windows and must
be loaded from a floppy disk.
To install Memtest86:
- Extract the files from the zip archive
- Open the directory where the files were extracted and click on "install.bat".
- The install program will prompt you for the floppy drive and also prompt you to
insert a blank floppy.
- To run Memtest86 leave the floppy in the drive and reboot.
NOTE: After the boot floppy has been created you will not be able to read the floppy
from windows. This is normal.