New computer keeps crashing- vertical lines

Marrik

New member
New comp arrived yesterday and keeps crashing with the screen going grey and having black vertical lines across it.When it crashes the screen goes first then the audio cuts out a few seconds later.
This has happened three times since last night, after the second time i re-installed the graphics drivers to see if that would make a difference.
After the third crash i went into the event viewer to see if there were any errors and the only error is that "The previous system shutdown at 16:01:36 on ‎11/‎7/‎2012 was unexpected.".

Any ideas or suggestions?
 
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