its called "the blue screen of death" basically what this means is that ure pc has shut itself down to prevent further damage ( ie hardware faults ) OR ure pc doesnt agree with something ( i.e software/ outdated drivers ) and the pc has had to stop ( shutdown)
we can help identify this issue for you by simply uploading the files that contain the information relating to the error.
you can also stop the automatic restart by doing the following, start > right click my computer > properties > advanced system settings > startup and recovery section and click settings > untick automatic restart
(THE X PART OF THE X:/ ONLY REFERS TO URE DRIVE LETTER, USUALLY DEFAULTED AT C:/ )
up load the most recent file that you have in that folder and we will take a look for you...