FIX: Windows Defender Error 0x80073b01

Teodor Nechita
by Teodor Nechita
Software Managing Editor
Affiliate Disclosure

windows defender 0X80073b01
To fix various PC problems, we recommend DriverFix: This software will keep your drivers up and running, thus keeping you safe from common computer errors and hardware failure. Check all your drivers now in 3 easy steps:
  1. Download DriverFix (verified download file).
  2. Click Start Scan to find all problematic drivers.
  3. Click Update Drivers to get new versions and avoid system malfunctionings.
  • DriverFix has been downloaded by 0 readers this month.

Windows 10 is a near-complete package when it comes to having an operating system at home, as it comes with pretty much every kind of built-in tool imaginable.

For example, it comes with its own lines of defense in the form of a firewall program and antivirus known as Windows Defender. However, this is too nothing more than a piece of software that can be easily susceptible to bugs and issues.

One good example is Windows Defender Error 0x80073b01 which many users have reported to be giving them plenty of hard times.


Thankfully enough, this issue is quite common, and there are several fixes that you can try in order to get rid of it. Thus, all you need is to continue reading the step-by-step guide written below.

How do I fix Windows Defender Error 0x80073b01?

1. Remove any third-party antivirus software

Since Windows Defender is the default antivirus tool of Windows 10, it goes without saying that interferences may appear between it and any other similar third-party tool.

As such, simply open your list of installed programs and uninstall it like any other software, while following the on-screen instructions of the uninstall setup.

Note: Some antivirus tools can only be removed via dedicated uninstallers downloaded from the developer’s website. Thus, make sure you document yourself regarding the steps of uninstalling your particular antivirus tool.

If Windows Defender doesn’t cut it anymore, check out this list of the best antivirus tools to use today

2. Modify certain registriesregistry editor

  1. Press Windows + R
  2. Type in Regedit and press Enter
    • This will open the Registry Editor
  3. Go to the following address and delete the msseces.exe entry from both of them:
    • HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/WindowsNT/Current Version/ImageFileExecutionOption/
    • HKEY_CURRENT-USER/Software/Microsoft/Windows/Current version/Policies/Explorer/DisallowRun
  4. Reboot the PC

Can’t access the Registry Editor? Things aren’t as scary as they seem. Check out this guide and solve the issue quickly.

3. Run a SFCsfc

  1. Press Start
  2. Type in CMD
  3. Select Command Prompt from the list, right-click it and run it as an administrator
  4. Type in the following command and press Enter:
  5. sfc /scannow
  6. Once the scan is complete, reboot the PC

4. Update your PCcheck for updates

  1. Press Start
  2. Select Settings
  3. Choose Update & Security
  4. Select Check for Updates
    • If updates are already pending, the button will be renamed to Download Updates
  5. Wait for the updates to install, and reboot your PC

By following these steps, you should be able to now use Windows Defender without any further issues. These methods have proven themselves to be very useful, and they are also very efficient in a number of other Windows 10-related issues.

If you know of any other method we may have missed out on that will fix Windows Defender Error 0x80073b01, then leave us a message in the comment section below.


There are no comments yet. Please leave a comment

add a comment

Leave a Reply

Your email address will not be published. Required fields are marked *