One such application is Disk Defragmenter. When that happens, applications cease to function properly. Some antivirus programs are known to interfere with Windows’ components. If the Disk Defragmenter refuses to run on your PC, chances are that your antivirus software is to be blamed. Check if Your Antivirus is Causing Hindrance You can now try and relaunch the Disk Defragmenter and check if it has started to function again. When the command prompt window opens, type sfc /scannow.Choose Run as administrator from the right-hand side.In case, the defrag facility is not working on your Windows 10 PC due to an error, the SFC command will scan for the error and help resolve it. System File Checker or SFC is a Windows 10 command which scans and identifies any impending errors and then delivers appropriate solutions.

This procedure should help you get back your Disk Defragmenter back on track. Also, the below-mentioned services should be set to automatic (check the Startup Type tab).Check in the Startup Type if it is set to manual (check the Startup Type tab).Press Windows + R and open the Run dialog box.Here is how you can check or set up defrag service in Windows using the services –

If the disk defragmenter service is not set properly, it will not run properly or not run at all. Check if Disk Defragmenter Service is Running The Way It Should Ways To Make Disk Defrag Work on Windows 10 Again 1.

Applications running in the background and not letting the Disk Defragmenter open.

Your antivirus is interfering with “Defragment and optimize hard drives” functionality.

Reasons Why Defrag is Not Working on Your Windows 10 PC? However, what if you find that defrag is not working on your Windows 10 PC? Let’s first see what can be some of the common reasons because of which this problem may occur.

Click on the drive where you see some percentage of fragmentation in the Current Status section.

In the Windows search bar, type Defragment and optimize hard drives.

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