Could you please check out this article http://blogs.adobe.com/crawlspace/2012/07/photoshop-basic-troubleshooting-steps-to-fix-mos t-issues.html and let us know if that solutions listed help you get back to Photoshop?
i've tried everything - and still nothing. wondering if it's a memory issue but not sure how to tell. this started happening when i installed the photoshop on creative cloud a couple weeks ago to try it out. i didn't love it so uninstalled it but ever since my photoshop cs3 won't work.
i've already tried that - no luck
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(Cloud) uninstalled it but ever since my photoshop cs3 won't work
Read Cloud takes over https://forums.adobe.com/thread/2089127 for some ideas (see reply #1)
Also, if you need to reinstall CS3, your original version and serial number will not work
CS3 and Acrobat 8 activation server is retired see reply #1 https://forums.adobe.com/thread/2372929
-steps to fix activation problem in https://forums.adobe.com/thread/2385900