We need more details like what happens when you try to run ps7?
Does it give an error message?
Have you made any major changes to your computer like a new and/or bigger hard drive?
A quick thing you can do is reset the ps7 preferences file and see if that makes difference:
The program just does not open. Not with the a normal double click or manual "open program" from program file. No error message at all. I can't open so I'm not able to change any settings. I had no changes in my system. Any suggestions?
Sent from my iPhone
Yes, as R_Kelly suggested reset your preferences. Start PS and immediately hold down the Crtl Alt Shift keys. If fast enough you will get a reset window. A little tricky. If you get splash screen first you are too late.
You can delete the preferences file manually by going to:
C:\Users\Your Name\AppData\Roaming\Adobe\Photoshop\7.0\Adobe Photoshop 7.0 Settings
and deleting the folder called Adobe Photoshop 7.0 Settings
(you need to have show hidden files and folders checked in your folder options to see the files)
Another thing to try is going to:
C:\Program Files (x86)\Adobe\Photoshop 7.0 (64 bit system)
C:\Program Files\Adobe\Photoshop 7.0 (32 bit system)
and right click on the Photoshop.exe and choose Run as Administrator and see if it starts then.
Also, have you installed the photoshop 7.01 update?