What does the DefMgr.exe file do?
The DefMgr.exe process is also known as Microsoft Default Manager or, as the case may be, WinFX Runtime Components and is a part of Default Manager or, as the case may be, Windows Internet Explorer. This software is produced by Microsoft (www.microsoft.com). An obsolete or defective version of DefMgr.exe can cause problems for your computer that can range from slowness to error messages such as these:
- Microsoft Default Manager has stopped working. Windows is checking for a solution to the problem... (Windows 10, 8, 7)
- Microsoft Default Manager 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)
- DefMgr.exe has encountered a problem and needs to close. (Windows XP)
- Access violation at address FFFFFFFF in module DefMgr.exe. Read of address 00000000.
Free PC Check
Scan your computer today at no charge with the Windows Repair Tool. This tool helps repair Windows and helps it run faster.
What you should know about DefMgr.exe Microsoft Default Manager
DefMgr.exe is not part of Windows, but it is important nonetheless. DefMgr.exe is found in a subdirectory of "C:\Program Files".
Frequently occurring are file sizes such as 288,080 bytes (37% of all these files), 439,568 bytes as well as 5 other variants.
The application is recognizable as a window and also on the taskbar. The DefMgr file was developed by a so-called third party provider - and not by Microsoft. DefMgr.exe has a digital signature. This confirms that the producer has been registered with a certificate authority. This DefMgr program is initiated as part of Windows start-up (Registry: MACHINE\Run). To remove the file and its related software from your computer, click Programs in Control Panel For this reason, 8% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.
A DefMgr.exe file has a 76% certainty of being dangerous if it is found in the C:\Windows\System32\drivers directory. In this case, the file size is usually 104,448 bytes. It is interesting to note that the file is placed in the Windows folder, even though it is not part of the operating system. This particular software does not have a visible window, and does not appear on the taskbar. When Windows starts, this process is automatically started at the same time (Registry: MACHINE\Run). This DefMgr.exe process is receiving or sending data on the LAN (your local network) or on the Internet. It was developed by a so-called third party provider - and not by Microsoft. DefMgr.exe is capable of monitor other applications.
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 DefMgr.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 DefMgr?
The file spreads very slowly and does not often make an appearance. Therefore, feedback from other users is not yet available.
Summary: source: file.net
How to uninstall Default Manager or Windows Internet Explorer
To remove Microsoft Default Manager from your computer, please follow the manual instructions below or use an automatic uninstaller product.
- Click the Windows Start Button. In Windows 8, look for Control Panel.
- Click Control Panel.
- Click Uninstall a program.
- Look for Default Manager or Windows Internet Explorer in the list of available programs.
- Click Uninstall.
How to tell if DefMgr.exe (Microsoft Default Manager) 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 Microsoft Default Manager. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for Microsoft Default Manager 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 DefMgr.exe is causing problems for you, a good Registry Cleaner 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.