The 1st image that you are trying to open in PS CC, is it a very large image? What is the size of the file. Try opening a small size image and check.
Try resetting the PS CC preferences and check if it's an issue with corrupt preferences : http://forums.adobe.com/thread/375776
Try to open PS CC in Plugin Disabled mode and check the same. For that Press Shift+PS CC icon and hit Yes.
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[Moved the discussion to Photoshop Forum]
Is your data stored on a seperate drive that goes into sleep mode when not used for a while? If that sounds like the answer, try changing the sleep settings. To prove it, view the image file in My documents or whatever, and then open in Photoshop. If it opens straight up, you know that's what's going on.