O&O Defrag Professional O&O Defrag Professional

A guide to uninstall O&O Defrag Professional from your PC

This info is about O&O Defrag Professional for Windows. Here you can find details on how to remove it from your computer. It is made by O&O Software GmbH. Check out here where you can find out more on O&O Software GmbH. Further information about O&O Defrag Professional can be seen at . O&O Defrag Professional is normally set up in the C:\Program Files\OO Software\Defrag folder, depending on the user's choice. The full uninstall command line for O&O Defrag Professional is MsiExec.exe /I{28BA9F7E-AEAA-4CC1-9F13-B1CCD284C8CE}. The application's main executable file has a size of 5.15 MB (5398312 bytes) on disk and is labeled oodcnt.exe.

O&O Defrag Professional contains of the executables below. They occupy 15.71 MB (16468000 bytes) on disk.

  • oodag.exe (1.94 MB)
  • oodcmd.exe (2.83 MB)
  • oodcnt.exe (5.15 MB)
  • oodsvct.exe (86.79 KB)
  • oodtray.exe (4.81 MB)
  • oodwrtlic.exe (165.29 KB)
  • ooliveupdate.exe (750.30 KB)
...click to view all...

The information on this page is only about version 16.0.367 of O&O Defrag Professional. For more O&O Defrag Professional versions please click below:

...click to view all...
When planning to uninstall O&O Defrag Professional you should check if the following data is left behind on your PC.

You should delete the folders below after you uninstall O&O Defrag Professional:
  • C:\Program Files\OO Software\Defrag
  • C:\ProgramData\Microsoft\Windows\Start Menu\Programs\O&O Software\O&O Defrag
  • C:\Users\UserName\AppData\Local\O&O\O&O Defrag

Usually, the following files are left on disk:
  • 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

Registry keys:
  • 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\Microsoft\Windows\CurrentVersion\Uninstall\{981509D0-F8BF-4810-A75A-8FC90FA0581C}

Open regedit.exe to delete the values below from the Windows Registry:
  • HKEY_CLASSES_ROOT\CLSID\{48EAD1E1-ECF2-4A85-AA09-1C44FBEED451}\InprocServer32\
  • HKEY_CLASSES_ROOT\CLSID\{677D54F0-573E-11D4-9385-005004518EC8}\InprocServer32\
  • HKEY_CLASSES_ROOT\CLSID\{8AC29A61-573D-11D4-9385-005004518EC8}\InprocServer32\
  • HKEY_CLASSES_ROOT\CLSID\{8AC29A61-573D-11D4-9385-005004518EC8}\ToolboxBitmap32\

A way to uninstall O&O Defrag Professional from your computer with the help of Advanced Uninstaller PRO

O&O Defrag Professional is a program released by the software company O&O Software GmbH. Sometimes, people try to remove this application. This can be difficult because uninstalling this by hand requires some skill regarding Windows internal functioning. The best SIMPLE way to remove O&O Defrag Professional is to use Advanced Uninstaller PRO. Here is how to do this:

1. If you don't have Advanced Uninstaller PRO already installed on your system, add it. This is good because Advanced Uninstaller PRO is one of the best uninstaller and general tool to take care of your computer.


2. Run Advanced Uninstaller PRO. Take your time to get familiar with Advanced Uninstaller PRO's interface and number of features available. Advanced Uninstaller PRO is a powerful package of tools.

3. Press the General Tools button
Go to General Tools

4. Activate the Uninstall Programs tool
Go to Uninstall Programs

5. All the applications installed on your PC will be shown to you

6. Navigate the list of applications until you locate O&O Defrag Professional or simply click the Search field and type in "O&O Defrag Professional". The O&O Defrag Professional application will be found very quickly. After you click O&O Defrag Professional in the list of applications, some information about the program is available to you:

  • Star rating (in the left lower corner). This explains the opinion other users have about O&O Defrag Professional, from "Highly recommended" to "Very dangerous".
  • Opinions by other users - Press the Read reviews button.
  • Technical information about the application you are about to uninstall, by pressing the Properties button.
For instance you can see that for O&O Defrag Professional:

  • The publisher is: http://www.oo-software.com
  • The uninstall string is: MsiExec.exe /I{28BA9F7E-AEAA-4CC1-9F13-B1CCD284C8CE}
7. Press the Uninstall button. A confirmation window will come up. accept the removal by pressing Uninstall. Advanced Uninstaller PRO will then uninstall O&O Defrag Professional.
Uninstall O&O Defrag Professional

8. After removing O&O Defrag Professional, Advanced Uninstaller PRO will offer to run an additional cleanup. Click Next to go ahead with the cleanup. All the items that belong O&O Defrag Professional which have been left behind will be detected and you will be asked if you want to delete them. By removing O&O Defrag Professional using Advanced Uninstaller PRO, you can be sure that no Windows registry entries, files or folders are left behind on your computer.

Your Windows computer will remain clean, speedy and ready to take on new tasks.


Geographical user distribution

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


The text above is not a piece of advice to uninstall 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 computer. This text simply contains detailed instructions on how to uninstall O&O Defrag Professional in case you decide this is what you want to do. Here you can find registry and disk entries that our application Advanced Uninstaller PRO discovered and classified as "leftovers" on other users' PCs.

2016-07-15 / Written by Dan Armano for Advanced Uninstaller PRO

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Last update on: 2016-07-15 09:04:59.703