According to MSKB137539 the General
CAUSES of STOP 0x0000007F error are due to either of the following conditions :
• Your computer has hardware or software problems (hardware failure is the most common cause).
-or-
• You try to over clock the speed of your computer's processor (for example, you set a 150 MhZ processor to run at 187 MhZ).
According to MSKB Q137539
STOP 0x0000007F Error means a trap occurred in kernel mode and the trap is either one the kernel is not allowed to have or is always fatal.
The most common causes of a STOP 0x7F are:
• Low-level hardware corruption, such as corrupt memory (RAM)
• Mismatched memory modules
• A malfunctioning motherboard
The most important parameter in the error is the FIRST one, in your case its value is 0x000000008.
That value may indicate 0x00000008 Double Fault
The two primary causes for this value are hardware and kernel stack overflows. Hardware problems are usually related to CPU, RAM, or bus. Kernel stack overflows are almost always caused by faulty kernel-mode drivers.
If you have not installed or uninstalled any Software in the recent past BEFORE this STOP ERROR occurred, you can rule out Software causes and concentrate on the more common hardware issues.
Running Memtest86 to rule in or out a damaged RAM Module is the first software test you can do.
Replace any RAM reported as bad. Also, make sure all the RAM in the computer is the same speed.
Try removing or swapping out controllers, cards, or other peripherals is next in order
Updated hardware drivers or BIOS updates, or both can be another troubleshoot you can try.
Finally consider that the Motherboard itself may be faulty needing replacement.
In this kind of situation providing details about the Computer including whether it is a Laptop or Desktop and its EXACT model name as displayed on its case and whether there has been any software or hardware change preceeding the problem and whether Malware as the cause has been ruled out by the use of proper AntiVirus/Antispyware programs with current definitions etc are all are very relevant and useful to those who offer help.