How to Fix Windows Defender Error 0x80073b01

Some Home windows customers could expertise error code 0x80073b01 when utilizing Home windows Defender safety software program. This error prevents entry to some options of Home windows Defender, posing a safety risk. On this article, we’ll focus on the right way to repair Home windows Defender error 0x80073b01.

With this error code, chances are you’ll get the next error message –

An error has occurred in this system throughout initialization. If this downside continues, please contact your system administrator.
Error code: 0x80073b01

How to Fix Windows Defender Error 0x80073b01

Microsoft Defender Error 0x80073b01 on Home windows 10

To repair the Microsoft Defender Error 0x80073b01, use the next strategies:

1. Take away third-party safety software program

In case you have a third-party program put in, you will need to first take away it. It’s because the third social gathering safety software program blocks system file companies so chances are high that is the issue. To take away safety software program, comply with these steps:

  • Press the Home windows + I to launch the Settings app.
  • On the following web page, choose Apps > Apps & Options on the left column.
  • Then transfer to the suitable pane, scroll down, and seek for the antivirus program put in in your system.
  • As soon as you discover it, click on on it and choose the Uninstall button.
  • When a brand new dialog seems, click on the Uninstall possibility to verify it.

When you full the above course of, restart your laptop and see if Home windows Defender is now working correctly. If not, proceed to the following workarounds.

2. Modify the Registry Editor

This answer requires you to switch some registry entries. However earlier than going to the steps, be sure you know the stuff you’re going to do. It’s as a result of incorrectly utilizing Registry Editor information might be harmful and might trigger some severe points in your laptop. So, in case you’re snug with the Registry Editor, use the steps in any other case skip this methodology.

  • Click on on Begin, kind regedit, and press the Enter key to open the Registry Editor.
  • If UAC prompts on the display and asks in your permission, click on Sure.
  • Contained in the Registry Editor window, increase the left-side navigation to the next:
HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/WindowsNT/Present Model/Picture File Execution Choices
HKEY_CURRENT-USER/Software program/Microsoft/Home windows/Present model/Insurance policies/Explorer/DisallowRun

  • When you’re on the given deal with, delete the msseces.exe entry from each of them.
  • Restart your machine and your downside needs to be mounted now.

3. Re-register Home windows Defender DLL information

One other methodology you may attempt to clear up this downside is by re-registering the Home windows Defender DLL information. Listed here are the steps to take action:

  • Press the Home windows+X keys and choose Command Immediate (Admin) from the listing.
  • If UAC prompts on the display and asks in your permission, click on Sure.
  • Contained in the Command Immediate window, kind the next command and press Enter after every one:
regsvr32 wuaueng.dll
regsvr32 wucltui.dll
regsvr32 softpub.dll
regsvr32 wintrust.dll
regsvr32 initpki.dll
regsvr32 wups.dll
regsvr32 wuweb.dll
regsvr32 atl.dll
regsvr32 mssip32.dll

  • After re-registering the DLL information, restart your laptop and see if it mounted the problem.

4. Run an SFC scan

Typically corrupted or broken system information is likely to be additionally answerable for such a difficulty. So, the following methodology suggests you run the System File Checker utility as it is going to restore if any damaged system information. Listed here are the steps you need to use to run this instrument:


  • Open Command Immediate as Administrator.
  • Contained in the command immediate window, kind the command given beneath:
sfc /scannow

  • Press Enter to begin the scanning process.

5. Allow Home windows Defender Providers

When you’re nonetheless going through the Error Code 0x80073b01 in your laptop, probabilities there may be that some Home windows Defender companies are stopped. Listed here are the steps you need to use to make them allow:

  • Open the Run dialog field utilizing the Home windows+R keys.
  • Within the dialog field, kind companies.msc and hit Enter.
  • Scroll all the way down to the Home windows Defender Antivirus Service after which double-click on it.

Windows Defender Antivirus Service

  • Contained in the properties window, set the Startup kind to Handbook utilizing the drop-down menu. Additionally, click on on the Begin button to make the Service standing – Working.
  • Click on Apply > OK.

After enabling the Home windows Defender Antivirus Service, additionally open another companies and verify their standing:

  1. Home windows Defender Firewall – Automated
  2. Home windows Defender Superior Risk Safety – Handbook
  3. Microsoft Defender Antivirus Community Inspection Service – Handbook

I hope among the strategies on this put up helped you to resolve the Home windows Defender Error Code 0x80073b01. In case you’ve any queries or strategies, let’s know within the remark part. 

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