Fix Acrobat Error 28000: OOBE Folder Rename Blocked by Malwarebytes
Question details
The user is unable to install Adobe Acrobat Pro DC due to Error 28000, and cannot apply the OOBE folder rename fix because Windows reports the folder is in use by another program.
- Product
- Adobe Acrobat Pro DC
- Device & OS
- Windows
- Scenario
- Installing or repairing the Adobe Acrobat software suite.
- Observed behavior
- The installation fails with Error 28000. When attempting to rename the OOBE folder, the system blocks the action, stating the folder is open, which is caused by Malwarebytes or other security software.
Ensure you have administrative privileges on your Windows PC and check Task Manager to confirm no Adobe background processes are currently running.
Temporarily Disable Antivirus to Rename the OOBE Folder
Pause your third-party security software to release its lock on the OOBE folder, allowing you to rename it and proceed with the installation.
Security software actively monitors system folders to prevent unauthorized modifications. Occasionally, it incorrectly flags or locks legitimate installation temporary directories like Adobe's OOBE folder, preventing setup or repair operations.
Locate the Malwarebytes (or your specific antivirus) icon in the Windows system tray at the bottom right of your screen. Right-click the icon and select 'Quit' or 'Disable Protection' temporarily.
Open File Explorer and navigate to the Adobe OOBE folder. This is typically located at C:\Program Files (x86)\Common Files\Adobe\OOBE or C:\Users\[YourUsername]\AppData\Local\Adobe\OOBE.
Right-click the OOBE folder and rename it to 'OOBE_old'. Since the security software is disabled, Windows should now allow the rename.
Run the Adobe Acrobat Pro DC installer again. The installation should now proceed without Error 28000.
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Frequently Asked Questions
Where is the Adobe OOBE folder located on Windows?
The OOBE folder is typically found at C:\Program Files (x86)\Common Files\Adobe\OOBE or in your user directory at C:\Users\[YourUsername]\AppData\Local\Adobe\OOBE. You may need to enable 'Hidden items' in the File Explorer View tab to see the AppData folder.
Why does Malwarebytes lock the OOBE folder?
Security software like Malwarebytes actively monitors application data and system files to prevent malicious modifications. During complex software installations, it may temporarily lock active temporary folders like Adobe's OOBE to scan for threats, inadvertently blocking the installer.
What does Adobe Acrobat Error 28000 mean?
Error 28000 is an installation error indicating that the setup wizard failed to overwrite, rename, or write to required licensing or setup directories. This is most commonly caused by system permission issues, locked background processes, or interference from third-party security applications.
