O&O Defrag Professional O&O Defrag Professional

How to uninstall O&O Defrag Professional from your system

O&O Defrag Professional is a Windows application. Read more about how to remove it from your computer. The Windows release was created by O&O Software GmbH. More data about O&O Software GmbH can be found here. Please follow if you want to read more on O&O Defrag Professional on O&O Software GmbH's web page. The application is frequently installed in the C:\Program Files\OO Software\Defrag folder. Keep in mind that this location can vary depending on the user's choice. O&O Defrag Professional's complete uninstall command line is MsiExec.exe /I{50C961A1-889F-4A4E-9587-2772A45B6AAD}. oodcnt.exe is the O&O Defrag Professional's primary executable file and it takes circa 4.46 MB (4679464 bytes) on disk.

O&O Defrag Professional is comprised of the following executables which take 13.70 MB (14361624 bytes) on disk:

  • oodag.exe (1.58 MB)
  • oodcmd.exe (2.27 MB)
  • oodcnt.exe (4.46 MB)
  • oodsvct.exe (61.29 KB)
  • oodtray.exe (4.26 MB)
  • oodwrtlic.exe (96.29 KB)
  • ooliveupdate.exe (993.29 KB)
...click to view all...

The information on this page is only about version 18.0.39 of O&O Defrag Professional. You can find here a few links to other O&O Defrag Professional releases:

...click to view all...
If you are manually uninstalling O&O Defrag Professional we advise you to verify if the following data is left behind on your PC.

Directories that were left behind:
  • C:\Program Files\OO Software\Defrag
  • C:\Users\UserName\AppData\Local\O&O\O&O Defrag

The files below are left behind on your disk by O&O Defrag Professional when you uninstall it:
  • C:\Program Files\OO Software\Defrag\oodag.exe
  • C:\Program Files\OO Software\Defrag\oodagmg.dll
  • C:\Program Files\OO Software\Defrag\oodagrs.dll
  • C:\Program Files\OO Software\Defrag\oodagt.adm
  • C:\Program Files\OO Software\Defrag\oodcmd.exe
  • C:\Program Files\OO Software\Defrag\oodcmdrs.dll
  • C:\Program Files\OO Software\Defrag\oodcnt.exe
  • C:\Program Files\OO Software\Defrag\oodgui.adm
  • C:\Program Files\OO Software\Defrag\oodguirs.dll
  • C:\Program Files\OO Software\Defrag\oodjobd.dll
  • C:\Program Files\OO Software\Defrag\oodjobdr.dll
  • C:\Program Files\OO Software\Defrag\oodpe.chm
  • C:\Program Files\OO Software\Defrag\oodpeo.ocx
  • C:\Program Files\OO Software\Defrag\oodpep.dll
  • C:\Program Files\OO Software\Defrag\oodperwr.dll
  • C:\Program Files\OO Software\Defrag\oodpesur.dll
  • C:\Program Files\OO Software\Defrag\oodsh.dll
  • C:\Program Files\OO Software\Defrag\oodshrs.dll
  • C:\Program Files\OO Software\Defrag\oodsvct.exe
  • C:\Program Files\OO Software\Defrag\oodtray.exe
  • C:\Program Files\OO Software\Defrag\oodtrrs.dll
  • C:\Program Files\OO Software\Defrag\oodwrtlic.exe
  • C:\Program Files\OO Software\Defrag\ooliveupdate.exe
  • C:\Program Files\OO Software\Defrag\oorwiz4.dll
  • C:\Program Files\OO Software\Defrag\oosu.dll
  • C:\Program Files\OO Software\Defrag\readme.txt
  • C:\Program Files\OO Software\Defrag\rpcdat01.htm
  • C:\Program Files\OO Software\Defrag\rpcdrv01.htm
  • C:\Program Files\OO Software\Defrag\rpcmn01.htm
  • C:\Users\UserName\AppData\Local\O&O\O&O Defrag\ocx\ocxdata.oodguisettings
  • C:\Users\UserName\AppData\Local\Temp\OO Software\OO LiveUpdate\20180517132928_O&O Defrag Professional.log
  • C:\Users\UserName\AppData\Local\Temp\OO Software\OO LiveUpdate\20180517132940_O&O Defrag Professional.log
  • C:\Users\UserName\AppData\Local\Temp\OO Software\OO LiveUpdate\20180517133354_O&O Defrag Professional.log
  • C:\Users\UserName\AppData\Local\Temp\OO Software\OO LiveUpdate\20180517160455_O&O Defrag Professional.log
  • C:\Windows\Installer\{7448626F-860F-4A48-BD4B-2BDBCB64B4E9}\app_icon.ico

Registry that is not cleaned:
  • HKEY_CURRENT_USER\Software\O&O\O&O Defrag
  • HKEY_CURRENT_USER\Software\O&O\O&O LiveUpdate\O&O Defrag Professional
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products\F6268447F06884A4DBB4B2BDBC464B9E
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall\{7448626F-860F-4A48-BD4B-2BDBCB64B4E9}
  • HKEY_LOCAL_MACHINE\Software\O&O\O&O Defrag
  • HKEY_LOCAL_MACHINE\Software\O&O\O&O LiveUpdate\O&O Defrag Professional
  • HKEY_LOCAL_MACHINE\Software\Policies\O&O\O&O Defrag

Registry values that are not removed from your computer:
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products\F6268447F06884A4DBB4B2BDBC464B9E\ProductName
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\Folders\C:\Program Files\OO Software\Defrag\
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\Folders\C:\Windows\Installer\{7448626F-860F-4A48-BD4B-2BDBCB64B4E9}\
  • HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\OODefragAgent\ImagePath

A way to erase O&O Defrag Professional using Advanced Uninstaller PRO

O&O Defrag Professional is a program by the software company O&O Software GmbH. Sometimes, people decide to remove this application. Sometimes this is troublesome because removing this manually requires some experience related to Windows internal functioning. One of the best QUICK manner to remove O&O Defrag Professional is to use Advanced Uninstaller PRO. Take the following steps on how to do this:

1. If you don't have Advanced Uninstaller PRO already installed on your Windows PC, add it. This is good because Advanced Uninstaller PRO is the best uninstaller and all around utility to optimize your Windows computer.


2. Run Advanced Uninstaller PRO. It's recommended to take your time to get familiar with the program's design and number of functions available. Advanced Uninstaller PRO is a very useful Windows tool.

3. Click on the General Tools button
Go to General Tools

4. Click on the Uninstall Programs button
Go to Uninstall Programs

5. All the applications existing on your computer will be shown to you

6. Navigate the list of applications until you find O&O Defrag Professional or simply activate the Search feature and type in "O&O Defrag Professional". If it exists on your system the O&O Defrag Professional app will be found very quickly. Notice that after you select O&O Defrag Professional in the list of apps, the following data about the program is made available to you:

  • Star rating (in the lower left corner). The star rating explains the opinion other users have about O&O Defrag Professional, from "Highly recommended" to "Very dangerous".
  • Opinions by other users - Click on the Read reviews button.
  • Details about the application you wish to remove, by clicking on the Properties button.
For instance you can see that for O&O Defrag Professional:

  • The software company is: http://www.oo-software.com
  • The uninstall string is: MsiExec.exe /I{50C961A1-889F-4A4E-9587-2772A45B6AAD}
7. Click the Uninstall button. A window asking you to confirm will appear. Confirm the removal by pressing the Uninstall button. Advanced Uninstaller PRO will then uninstall O&O Defrag Professional.
Uninstall O&O Defrag Professional

8. After uninstalling O&O Defrag Professional, Advanced Uninstaller PRO will offer to run a cleanup. Press Next to perform the cleanup. All the items that belong O&O Defrag Professional that have been left behind will be found and you will be able to delete them. By removing O&O Defrag Professional with Advanced Uninstaller PRO, you are assured that no registry entries, files or directories are left behind on your computer.

Your system will remain clean, speedy and able to run without errors or problems.


Geographical user distribution

  • 10.0
  • Windows 7 (6.1)
  • Windows 8.1 (6.3)
  • Windows XP (5.1)
  • Windows Vista (6.0)
  • Windows 8 (6.2)
  • Windows (6.4)
Software Application


The text above is not a recommendation to remove O&O Defrag Professional by O&O Software GmbH from your PC, nor are we saying that O&O Defrag Professional by O&O Software GmbH is not a good application for your PC. This text simply contains detailed instructions on how to remove O&O Defrag Professional supposing you decide this is what you want to do. The information above contains registry and disk entries that Advanced Uninstaller PRO stumbled upon and classified as "leftovers" on other users' PCs.

2016-06-19 / Written by Dan Armano for Advanced Uninstaller PRO

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Last update on: 2016-06-19 20:51:06.257