If this problem continues, just contact your administrator.
Windows Defender error 0x800b0100 can be triggered by many factors.
On the other hand, your unit might also suffer from other destructive problems besides Windows Defender error 0x800b0100.
To secure your system, creating a backup of the system is a good option.
To create a system image, a piece ofreliable backup software MiniTool ShadowMaker stands out from similar products.
This tool is also famous for providing a one-click system backup solution.
Lets see how it works:
Step 1.
Download this tool for free and launch it.
MiniTool ShadowMaker TrialClick to Download100%Clean & Safe
Step 2.
In theBackupsection, you might choose the backup source and destination.
If you want to change the default destination path, just click onDESTINATIONand choose the path you want.
In this case, you only need to hitBack Up Nowto start the task.
After your system is backed up successfully, you better create a bootable drive.
Launch MiniTool ShadowMaker and go to theToolspage.
Tap onMedia Builder>WinPE-based media with MiniTool plug-in>USB Flash Disk.
HitYesto confirm this action when a warning message pops up.
How to Fix Windows Defender Error Code 0x800b0100?
Under theServicestab, checkHide All Microsoft Servicesand hitDisable all.
Go to theStartuptab and pressOpen Task Manager.
Right-punch each process and selectDisableone by one.
Go back toSystem Configurationand hitApply&OK.
Step 7. reset your setup for the changes to take effect.
Fix 2: Check Windows Defender Services
Step 1.
Press Win +Rto open theRundialog.
Scroll down to find all services related to Windows Defender including:
Step 4.
Right-click these services one by one and chooseStartin the context menu.
So, you gotta fire off the System File Checker (SFC) scan to fix them.
Typecmdto locateCommand Promptand right-hit it to chooseRun as administrator.
In the command window, typesfc /scannowand hitEnter.
The SFC scan will fix any corrupted files it detects, kindly wait patiently.
RunCommand Promptwith administrative rights.
Typedism.exe /Online /Cleanup-image /Restorehealthand hitEnter.
Wait for the system to complete.
If the progress bar gets stuck, dont worry!
It is normal and you just need to wait patiently.
Therefore, you could install a third-party software to perform a scan of your system.
Here, we will show you how to scan your OS with Malwarebytes.
Step 1.Download Malwarebytesfor free from the Malwarebytes official website.
Double-tap on theMBSetupfile to install it.
If prompted byUAC,hitYesto grant the permissions.
Perform a scan with this tool and choose theQuarantineoption after the tool detects any threat.
To move the threats, Malwarebytes will ask you to cycle your rig.
Wrapping Things up
This tutorial offers you 5 ways to fix Windows Defender error 0x800b0100.
Which method do you prefer?
Tell us your answers in the comment area below!
If you have any advice about our product, dont hesitate to tell us via[email protected].
We will reply to you as soon as we can!
