I can't save files in jpeg format in photoshop 7?

have been a photoshop user for fourteen years. I have photoshop 7 and all of a sudden I cannot save files as JPEGS. My files are 8 bit, RGB, not duplicates, and not B&W. Saving as copy doesn't work. Nothing works. I can only save them as photoshop files. I've never encountered this before. I don't know... show more have been a photoshop user for fourteen years. I have photoshop 7 and all of a sudden I cannot save files as JPEGS. My files are 8 bit, RGB, not duplicates, and not B&W. Saving as copy doesn't work. Nothing works. I can only save them as photoshop files. I've never encountered this before. I don't know if it was some other program I put into my computer that's holding these files or what. Reloading the program doesn't help. The error message I get says "Could not save as (name of file) because that document is currently open. Save using a different name..blah blah. But the file is not open in photoshop or any other program (sigh) Does anybody out there know what's happened here? Also, restarting my computer does not help at all. I tried this first,, then tried it again. I also tried shutting down user files running in the background in windows task manager, did not help. Nobody has the answer so far. I have no other image programs running my computer except windows. I have no other Adobe programs on my computer either. HELP!!!!!
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