Look at you Windows 8 reliability History Photoshop critical events reports see where Photoshop is crashing. Often you will find it may be in something like your display adapter's device drivers. Installing newer updated drivers in cases like that may resolve the problem. You need to get information about where Photoshop is failing.
The more information you supply about your situation, the better equipped other community members will be to answer. Consider including the following in your question: