I had the exact same problem as terrispeakz. When asking to open a file in Photoshop (and Illustrator), the window would flicker for a fraction of a second and then Photoshop would freeze, the only thing I could do was Ctrl+Alt+Del my way out of it. The only way I could open a file was to select it outside of Photoshop.
I tried deleting and reinstalling the programs : nothing.
I deleted the preference files as suggested on another forum : nothing.
I deleted all network printers, as it seems to be the answer in some cases : nothing.
Another suggestion that seems to work sometimes is to set PDF as default Printer : nothing.
I was about to shoot myself (or my screen).
Then I stumbled upon this :
http://kb2.adobe.com/cps/403/kb403268.htmlThe problem was that the Open Window was there, but outside the screen ! Here is what worked for me :
Use the keyboard to move the dialog back into view.
1. Choose File > Open or File > Save As. (Choose whichever dialog fails to appear on your screen.)
2. Remove your hand from your mouse or other pointing device.
3. Press and release the Alt key on your keyboard.
4. Press and release the Space bar.
5. Press and release the M key.
6. Use the Left or Right Arrow key to move the dialog box back into view on your monitor. Hold down the Left Arrow key for several seconds. If the Save As or Open dialog box does not appear, then hold down the Right Arrow key until the dialog appears.
Note: If you previously had other displays configured above or below your current display, you may need to use the Up or Down Arrow keys instead or the Left or Right Arrow keys.
7.Choose a file name and other options in the dialog, and then click Save or Open. Photoshop will remember the current window placement, and you can resume using your mouse or other pointing device.
I hope this can help!