Strange Finder/Dock crash. Grey desktop screen
I have a very odd issues with my MBP i7 running mountain lion. I recently booted up my mac, which took a rather long time especially for a flash drive. Once I was finally logged in I was greeted by a grey desktop. My usual backdrop was gone. No drives or icons displayed either. The top menu bar was all normal and available. However my dock was no longer available. The only way I could access anything was through keyboard short cuts Apple Shift N for window and Apple Shift A for applications folder. Once I had a window open I could happily navigate through all my folders. I can even open applications. But no dock, no bouncing icon. It's very weird.
Any help!!!!!