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Rejoice when you realise it’s just a product registration error.Have a minor heart attack when you get another activation error.Start the program, rejoice when it asks for your new serial code.Install Photoshop CS3 using the new CS3 installer.Optional, if you want to be extremely thorough: Run the Adobe Cleaner Tool (get it here ).
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CRITICAL STEP – Delete cache.db file from Program Files (x86)/Common Files/Adobe/Adobe PCD/cache. Skip this step and nothing will change and you’ll get the activation error again.
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