Symptoms
On a computer that is running Windows Server 2008 or Windows Vista, you receive the following Stop error message when you create a snapshot of a volume:?

STOP: 0×0000007E (parameter1, parameter2, parameter3, parameter4)
SYSTEM_THREAD_EXCEPTION_NOT_HANDLED Notes The parameters in this error message vary, depending on the configuration of the computer.Not all “0×0000007E” Stop errors are caused by this issue.For example, you receive this Stop error message after you enable Volume Shadow Copy Service on a volume for a secondary Data Protection Manager (DPM) server.
Resolution
This issue occurs because of a race condition in the Volume Shadow Copy Service driver (Volsnap.sys).
When the volume size is being changed in the snapshot creation process, the race condition might be encountered.