Check your cpu and reseat it, make sure its sits in perfectly and try again.
The reason k_tec12 is having a problem is because their version of the Windows 8 Enterprise Evaluation has expired. As a result of this the computer will shut down every hour. This is designed to do this, it's normal and can be corrected by uninstalling the program.
The following is an excerpt from Microsoft's TechNet Evaulation Center.
Q: When does the Windows 8 Enterprise 90-day evaluation expire?
A: The Windows 8 Enterprise 90-day evaluation is valid for 90 days after activation. Once the evaluation period expires, your computer will shut down every hour.
Edited by dc3, 14 December 2013 - 01:31 PM.