How to Fix Windows Defender Error Code: 0x80073b01


Windows Defender is Anti-spyware software that protects your computer from malware attacks and viruses. It is a crucial part of Window that aid combat virus and available free for Windows XP/7/8/8.1 users. Sometimes while running Window defender an error message occurs on the screen. The error code 0x80073b01 is said to be decisive windows errors that should be fixed instantly. Here we provide you some easy methods to fix Window Defender Error code 0x80073b01.

Steps to Fix Windows Defender Error Code: 0x80073b01.

Step 1: First you have to stop distrustful running procedures in Windows Task Manager.

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To open Task Manager, press CTRL+ALT+DEL.


Step 2: Display hidden folders and files.

  • In Start Menu, open Control Panel and then search for Folder option.
  • In folder option window, click on view tab and non-tick hide protected operating system files and tick hidden files and folders..


  • After then, press OK.

Step 3: The error code might be appear because of damaged installation of security essential. To get rid of this problem, do the following

  • Press Win+R keys together.
  • In Run dialog box, type regedit.


  • Click “OK” to open Registry editor.
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "<random>" = "%AppData%\<random>.exe"
 HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run "<random>" = "%AppData%\<random>.exe"
 HKEY_CURRENT_USER\Software\Microsoft\Windows\Current Version\Policies\Explorer\DisallowRun \ msseces.exe.
 HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\MpCmdRun.exe
 HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\MpUXSrv.exe
 HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\MSASCui.exe
 HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msconfig.exe
 HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msmpeng.exe
 HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msseces.exe
 HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon "Shell" = "%AppData%\<random>.exe"

Step 4: Delete all connected files.

C:\Program Files\<random>





Step 5: You have to delete all your record, history and cookies of internet.

  • Open internet explorer and go to “tools” and then, click on internet option.
  • After this, click on “advanced” tab in the internet options dialog box and click on “reset” button.
  • In reset section of internet explorer settings, check “delete personal settings box” and click on “reset”.

For Google Chrome,

  • Click on “Customize and Control Google Chrome” icon and select “Settings”. After then, click on “Show Advanced Settings” at the bottom of the page.
  • In your Google Chrome, click on “reset” button.

For Mozilla Firefox,

  • In Mozilla Firefox, click on Firefox button and go to “Help” sub-menu and choose “Troubleshooting Information”.
  • In troubleshooting information page, click on the “Reset Firefox” button.
  • In a confirmation window, you have to click “Reset Firefox”. This will close the Firefox to be reset.

Tool we recommend.

If the above methods do not help you to fix Windows Defender error code 0x80073b01, then use automatic removal software that is Regcure Pro to repair the error code. It is powerful software that repair infected system files in your system. It comes with a powerful scanning tool that can make your system error free. You can easily download this tool on your computer and after installing scan you Windows files. It is user friendly and easy to figure out. Here are steps to fix Windows Defender Error code using Regcure Pro.

Step 1: Download Regcure Pro.

Step 2: After then, double click on its .exe file and to install the program click on “Run”.


Step 3: When your installation process is complete, click on “Finish” button to close the setup.


Step 4: Open Regcure Pro and click on “Click to Start Scan” to scan your computer.


Step 5: First scanning may take some time so you have to wait till the scanning process is complete.


Step 6: After scanning, click on “Fix All” to fix the security issues.


Follow 3 Simple Steps to Repair PC Instantly!

  1. Step 1 – Download & Install PC Repair Tool.
  2. Step 2 – Click “Scan” button to diagnose the PC.
  3. Step 3 – Click “Fix Errors” to the fix the issues and you are done.

(Note: This powerful tool can increase your performance by 97%)

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