: The last version of Photoshop to officially support Windows 7 (with Service Pack 1) was Photoshop CC 2019 (version 20.x).
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Before tweaking any Adobe files, you must bring Windows 7 up to speed with modern code-signing requirements. Microsoft updated its update-signing verification to use SHA-2 encryption exclusively. Without these updates, Windows 7 cannot process modern software installers. Download SHA-2 Support Updates : The last version of Photoshop to officially
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Disable Windows Defender via the Control Panel under System and Security. Install: Attempt the Photoshop installation again.
If these folders don't exist, creating them manually can sometimes bypass the "damaged installer" trigger. 5. Install Visual C++ Redistributables
How to Fix Adobe Damaged Installer Errors for Photoshop on Windows 7