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Last updated on
12 Feb 2026
Learn how to resolve error code 501 "Package couldn't be installed because resources it modifies are currently in use" during Adobe app installation on Windows.
Error code 501 occurs when the Creative Cloud installer cannot proceed because a required file is in use by another application or background process.
The file is in use by another application
To fix this error, save your work and close the app or process listed in the error log. If you are unable to close the app, follow these steps:
Navigate to the Processes tab.
Find the app or process mentioned in the error log.
Right-click it and select End task to close this process.
Return to the installer and select Retry to continue the installation.
