Windows 10: Fix Windows 10 Upgrade error 0xa0000400

While upgrading to any version of Windows 10 using the Windows 10 Upgrade Assistant or Windows 10 Media Creation Tool, some people may encounter an error code 0xa0000400. It becomes important for a user to keep their computer up to [...]

This post Fix Windows 10 Upgrade error 0xa0000400 is from TheWindowsClub.com.

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Error of 0xa0000400 updating windows7 to Windows 10.

Hi Alex,

It's unfortunate that you are facing this issue. We'll certainly assist you to resolve it.

Share this information to assist you better.

• How are you upgrading to Windows 10? Is it through Windows update or ISO media?

We suggest you to refer the suggestions given by Andre Da Costa from the below link and check if it helps:

free upgrade error code 0xa0000400

Updating to Windows 10 error code 08x00704DD - 0x90016

Reference : How to Fix Windows 10 Setup Failure:

How to: Fix Windows 10 Setup Failure

Hope this helps, for further assistance, you can post your query in Microsoft Community

 

Windows 10 upgrade error 0xa0000400

Hi Sheetal,

As per the provided screenshot, I would like you to provide the information stated below:

1. When you state industry pro 8.1, do you mean Windows 8.1 Enterprise?

2. Are you trying to install Windows 10 enterprise or other version?



For now, I suggest that you refer to the post provided in the link below and check if it helps rectify the issue

Error code 0xa0000400 when I was upgrading my Windows 8.1

Hope this helps

Regards

 

Windows 10 Upgrade Assistant Error 0xa0000400

I have windows 8.1 Embedded Industry Pro, I reserved my windows 10 update prior to July 29th but have recieved no update notification since then so I tried using the Upgrade Assistant but recieved error code '0xa0000400'. How can I go about getting windows
10 now considering I do have it reserved?