Steps to fix Windows Defender error 0x800700aa on the computer

In this article, Tipsmake will show you how to fix Windows Defender error 0x800700aa of Windows 10.

1. Fix Windows Defender error 0x800700aa with Services

Services provides the services available on Windows 10, you can go directly here to customize some of them, including Windows Defender.

Step 1: Open the Start Menu and enter Services to open the Windows 10 service process.

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Step 2: Then, go to Windows Defender Advanced Threat Protection Service.

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Step 3: In the setup window, change the Startup Type to Automatic and click Apply => OK to agree.
Once done, restart your computer to check.

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2. Fix Windows Defender error 0x800700aa with Registry Editor

Registry Editor allows you to interfere with a lot of different data on the computer and this is also the favorite tool to use whenever the computer encounters an error.

Step 1: Open the Start Menu and enter Registry Editor to open it.

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Step 2: Then, copy the following link and paste it in the navigation bar to navigate to the folder you want to use.

HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/WinDefend

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Step 3: In the folder of WinDefend, find the Start item and double click to open it.

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Step 4: Finally, you just need to change the Value Data to 2 and click OK to finish.

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3. Fix Windows Defender error 0x800700aa with CMD

CMD – Command Prompt provides a lot of different features through lines of code and you can use them to check and fix errors quickly.

Step 1: Open the Start Menu and enter CMD to open the Command Prompt.

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Step 2: Then, copy the following commands in turn and paste them into the Command Prompt so that Windows automatically corrects the error.

wuaueng.dll Regsvr32
regsvr32 wucltui.dll
regsvr32 softpub.dll
regsvr32 wintrust.dll
regsvr32 initpki.dll
regsvr32 wups.dll
regsvr32 wuweb.dll
regsvr32 atl.dll
regsvr32 mssip32.dll

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Step 3: When you have finished running the commands, exit CMD and restart the computer to check.

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In this article, Tipsmake showed you how to fix Windows Defender error 0x800700aa on Windows 10: Have a nice day!

Marvin Fry

Update 12 December 2021