What is memdefrag.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the memdefrag.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

Click to Run a Free Scan for memdefrag.exe related errors

Memdefrag.exe file information

Windows Task Manager with memdefrag
Memdefrag.exe process in Windows Task Manager

The process known as Memory Defrager or Memory Optimizer belongs to software Glary Utilities or Glary Utilities Pro or Glary Utilities PRO by Glarysoft (

Description: Memdefrag.exe is not essential for the Windows OS and causes relatively few problems. Memdefrag.exe is located in a subfolder of "C:\Program Files (x86)" (primarily C:\Program Files (x86)\Glary Utilities\). Known file sizes on Windows 10/8/7/XP are 122,656 bytes (53% of all occurrences), 129,488 bytes, 108,344 bytes or 108,384 bytes. 
The file is not a Windows core file. It is a Verisign signed file. Memdefrag.exe is digitally signed. The program is not visible. The software starts when Windows starts (see Registry key: Run). Therefore the technical security rating is 26% dangerous, but you should also take into account the user reviews.

Uninstalling this variant: If you have any problems with memdefrag.exe, you can contact to assist you or uninstall Glary Utilities or Glary Utilities PRO software via Windows Control Panel/Add or Remove Programs (Windows XP) or Programs and Features (Windows 10/8/7).

Recommended: Identify memdefrag.exe related errors

Important: Some malware camouflages itself as memdefrag.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the memdefrag.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

Part of Glary Utilities 1.9 suite, a powerful utilities to increase your PC performance and maintain your system. Memory Optimizer monitors your system in the background and frees up memory whenever needed to increase the performance of your computer.If the available physical memory gets too low, Memory Optimizer causes the system to swap old data to the paging file to free up memory for your applications.
  Felix   (further information)
Part of Glary Utilities 1.9 suite, a powerful utilities to increase your PC performance and maintain your system.
Memory optimizer, if you choose so YOU can click on the program and see if you can free any memory from programs not in use. Not dangerous

Summary: Average user rating of memdefrag.exe: based on 3 votes with 3 user comments. 3 users think memdefrag.exe is essential for Windows or an installed application.

Do you have additional information? Help other users!

Best practices for resolving memdefrag issues

A clean and tidy computer is the key requirement for avoiding problems with memdefrag. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the memdefrag.exe process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

memdefrag.exe [all]