How to Fix Error 28000 When Malwarebytes Blocks Adobe Acrobat Pro DC Installation
Question details
The user is unable to install Adobe Acrobat Pro DC due to Error 28000 and cannot rename the OOBE folder because Windows reports it is in use.
- Product
- Adobe Acrobat Pro DC
- Device & OS
- Windows
- Scenario
- Installing Adobe Acrobat Pro DC software
- Observed behavior
- The installation fails with Error 28000, and the OOBE folder remains locked by the operating system despite no Adobe applications visibly running.
Ensure you have administrator privileges on your Windows account and save any ongoing work before temporarily adjusting your antivirus settings.
Temporarily Disable Malwarebytes and Rename the OOBE Folder
This is the most effective solution when your antivirus software mistakenly locks Adobe's installation directories, triggering Error 28000.
Antivirus programs like Malwarebytes monitor file system changes actively. When Adobe Acrobat's installer tries to modify or create the OOBE folder, Malwarebytes may block it to protect your system, resulting in the error and locked files.
Locate the Malwarebytes icon in your Windows system tray (bottom right corner). Right-click the icon and select 'Quit Malwarebytes' or choose to disable Real-Time Protection temporarily.
Open Windows File Explorer and navigate to the Adobe directory. Depending on your system, this is typically located at 'C:\Program Files (x86)\Common Files\Adobe\OOBE' or 'C:\Users\[Your Username]\AppData\Local\Adobe\OOBE'.
Right-click on the 'OOBE' folder and select 'Rename'. Change its name to 'OOBE_old'. This forces the installer to create a fresh directory without deleting your old files.
Run the Adobe Acrobat Pro DC installation file again. The process should now complete successfully without triggering Error 28000.
Once the installation is completely finished, immediately launch Malwarebytes to turn your real-time protection back on.
Force Close Background Adobe Processes via Task Manager
Use this method if the OOBE folder still cannot be renamed after disabling your antivirus, which means hidden background services are locking it.
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If you are struggling with Adobe Acrobat Pro DC installation errors and complex background folder conflicts, try WPS Office. It features a robust built-in PDF editor that is lightweight, installs easily, and won't conflict with your antivirus software.
- 1. Download the software: Visit the official WPS Office website and download the free unified installation package.
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Frequently Asked Questions
Why does Malwarebytes block the Adobe Acrobat installation?
Malwarebytes actively monitors real-time changes to your system's files. Because Adobe's installer modifies background services and creates new directories like the OOBE folder, the antivirus may mistakenly interpret this behavior as suspicious and block it.
What exactly is the OOBE folder used for?
The OOBE (Out of Box Experience) folder contains essential background files for Adobe Creative Cloud licensing, user sign-in components, and application initialization. Corrupted or locked files inside this folder frequently cause installation and launch errors.
Is it safe to delete the OOBE folder entirely?
Yes, you can safely delete it, as the installer will generate a new one. However, renaming it to 'OOBE_old' is the recommended and safer practice. It forces the installer to create a fresh directory while keeping your old files intact as a backup in case you need to restore them.
What if Windows still says the folder is in use after closing Adobe apps?
Even when Adobe applications appear closed, background services like Adobe Genuine Software Integrity Service or Adobe Update Service might still be running. You must use the Windows Task Manager to manually 'End task' on all background processes starting with 'Adobe'.
