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Uninstalling Onsite Managers

Uninstalling Onsite Managers

The purpose of this KB article is to assist with removing an Onsite Manager from an end device and leaving no trace of it behind.

Partners might want to do this after migrating an OM to another device, for a business sales pitch for the benefits of Barracuda RMM as an RMM platform at a potential client site, or to remove it entirely for any other reason. To accomplish this, please follow the steps below. 

To remotely uninstall an Onsite Manager

As of Barracuda RMM 12.1, you can remove an Onsite Manager from the site directly in Site Management.

This procedure removes all OM-managed devices immediately without the ability to reverse the process. 

  1. In your Service Center, go to Site Management > Sites.

  2. Select the checkbox beside the site in question.

  3. Click More Actions.

  4. Select Remove Onsite Manager.

  5. Fill in the CAPTCHA.

  6. Click OK.

If the site has any Device Managers installed, uninstall them. See this article.  

To locally uninstall an Onsite Manager (using either A or B method)

You can uninstall the Barracuda RMM Onsite Manager using the following two methods. 

A) To Remove Onsite Manager using Programs and Features/Add or Remove Programs

  1. Click Start.

  2. Open Control Panel.

  3. Select Programs and Features or Add or Remove Programs.

  4. Select Barracuda RMM Onsite Manager.

  5. Select Uninstall or Remove.

B) To Remove the MSI Cache

  1. Click Start and open Windows Explorer.

  2. Browse to C:\Windows\Installer.

  3. Right-click on the Category bar beside Size and select More.

  4. Find the Subject in the list and click OK.

  5. Sort by Subject.

  6. Locate Barracuda RMM Onsite Manager in the list.

  7. Right-click on the entry and select Uninstall.


Suppose you are not reinstalling Onsite Manager or installing an Onsite Manager for a different site on the computer. In that case, you can eliminate any trace of the application by following the procedures outlined below.

To migrate your Onsite Manager, please follow the How to Migrate an Onsite Manager KB here.

For Onsite Manager reinstalls, please use the latest version for your Service Center in the Barracuda Campus.

To remove file system artifacts

  1. Click Start and open Windows Explorer.

  2. Locate and delete the following folders:

    • C:\Program Files\Barracuda RMM

    • C:\Program Files (x86)\Barracuda RMM


For Barracuda RMM installed before 12 SP4 or upgraded from an installation before 12 SP4, the folders are:

  • C:\Program Files\Level Platforms

  • C:\Program Files (x86)\Level Platforms

  1. Click Start and Run the command regedit.exe.

  2. Locate and delete the Level Platforms key(s):

    • HKEY_LOCAL_MACHINE\SOFTWARE\Level Platforms

    • HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Level Platforms

What to do if Registry Keys will note delete:

  1. Download Regln: https://github.com/tenox7/regln/releases/download/2.2/regln-x64.exe

  2. Save to C:\Temp

  3. Open Command Prompt as Administrator

  4. Enter in cd c:\temp

  5. Run regln-x64 -d "HKLM\SOFTWARE\Level Platforms\Managed Workplace"

  6. Then run regln-x64 -d "HKLM\SOFTWARE\Level Platforms"

  7. And finally run regln-x64 -d “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Managed Workplace Thread Pool”


Barracuda RMM Support Caution

Performing the following action, which involves removing the Database, will cause your site to cease functioning. If you are only reinstalling your Onsite Manager cleanly, do not proceed. This step should only be done when there is no intention of maintaining the site.

To remove the database and artifacts

  • Open SQL Server Management Studio (SSMS) as Administrator

  • Connect to the LPIMWOMEXPRESS instance

  • In Object Explorer, expand Databases

  • Right-click on MWData and choose Tasks

  • Select Detach

  • In the Detach Database Window beside MWData, select Drop

  • Click Start and open Windows Explorer

  • Browse to: C:\Program Files\Microsoft SQL Server\MSSQL13.LPIMWOMEXPRESS\MSSQL\DATA

  • Select the MWData.mdf and MWData_log.ldf, and move or delete these.


You can also uninstall the SQL Server if it is the only SQL Server on the device. 

To remove the service account

  1. Launch Computer Management via Start - (Run) - type 'compmgmt.msc'.

  2. Expand Local Users and Groups.

  3. Right-click the account used to run MWExpertSystem (mwservice by default) and click Delete.

  4. Click Yes to confirm.

If you intend to re-purpose the device as an Onsite Manager at a new site, the system should now be clean and ready for use.

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