What does the oodag.exe file do?
The oodag.exe process is also known as O&O Defrag Agent (Version (x64)) and is a part of O&O Defrag Professional. This software is produced by O&O Software GmbH (www.oo-software.com). An obsolete or defective version of oodag.exe can cause problems for your computer that can range from slowness to error messages such as these:
- O&O Defrag Agent has stopped working. Windows is checking for a solution to the problem... (Windows 10, 8, 7)
- O&O Defrag Agent has stopped working. A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available. (Windows 10, 8, 7)
- oodag.exe has encountered a problem and needs to close.
- Access violation at address FFFFFFFF in module oodag.exe. Read of address 00000000.
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What you should know about oodag.exe O&O Defrag Agent
oodag.exe is not part of Windows, but it is important nonetheless. Oodag.exe is found in a subdirectory of "C:\Program Files".
Frequently occurring are file sizes such as 1,660,200 bytes (25% of all these files), 3,273,552 bytes, 1,740,864 bytes or, as the case may be, 1,719,584 bytes.
It is the service "OODefragAgent".
The original file is digitally signed. Check your file. The original file has a digital certificate (see its file properties). Oodag.exe was developed by a so-called third party provider - and not by Microsoft. The application does not have a visible window, and does not appear on the taskbar. You can find the file or its related application in Control Panel under Programs. You can then rerun the setup or uninstall the program.
Oodag.exe is capable of modify other Windows tasks as well as connect to the Internet.
For this reason, 17% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.
If you see this file on your hard drive or in Windows Task Manager, please make sure that it is not a malicious variant. It's a fact that many trojans try to cloak their true identity by calling themselves oodag.exe. With the above information or by using tools like Security Task Manager you can determine if, in your case, the file is an undesirable variant.
What do other computer users say about oodag?
Very good defrag tool | |
the best defrag Prog ever for single or network PC's DoNe | |
O&O Defrag very good tool T-Virus | |
very powerful background-defrag engine bond | |
good defrag tool |
Summary: 46 users judge oodag.exe to be an essential file that should not be touched. 2 users consider it harmless. For this reason, 2 users have already deleted oodag.exe. source: file.net
How to uninstall O&O Defrag Professional
To remove O&O Defrag Agent from your computer, please follow the manual instructions below or use an automatic uninstaller product.
- Click the Windows Start Button. You find it in the lower left corner of the taskbar.
- Type the word uninstall.
- Click Add or remove programs.
- Now locate O&O Defrag Professional in the list of displayed applications.
- Click the program, and then click Uninstall.


How to tell if oodag.exe (O&O Defrag Agent) was uninstalled cleanly
After uninstalling, restart your computer. Then start Windows Explorer and see if there is still a folder with the name of the software under C:\Program Files. Be sure to check the Registry as well for remnants of O&O Defrag Agent. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for O&O Defrag Agent or the name of the producer. Always keep in mind that only a computer professional should ever directly delete entries in the Windows Registry.
What to do if a program does not uninstall
The easiest way to remove any kind of software cleanly and accurately is to use an uninstaller tool. Because the uninstaller automatically creates a backup, there is no risk of anything going wrong.
Last but not least
If Windows not working quite right for you, or if startup is taking a long time, or oodag.exe is causing problems for you, a good Windows diagnostic tool may very well help. This is especially effective when it comes to older computers that have accumulated vast quantities of "garbage data" as the result of many software installs and uninstalls.
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