Is there a reason Photoshop would start refusing to open any type of files from Bridge and Window Explorer? If I double click a .psd file, nothing happens. If I drag the file over to Photoshop, it gives me the 'no' symbol, circle with a line through it. The only way to get files to open is to do it from photoshop.
It's done this a few times before, usually if I shut Photoshop down and restarted it would work, not helping this time though.