Didn't found the AppData folder in users[myUser] or anywhere. re-install solve it for me

For me the solutions here didn't help, but here's what helped.

1. Make sure the folder .docker/ in your home directory isn't marked as hidden in Windows.
2. Make sure docker has Active Directory to .docker folder. For example, if the owner of .docker/ is SYSTEM and not your user, Docker won't be able to read it and crash.

Got the same issue and fixed it by deleting %appdata%\Docker as mentioned by Github User "tocklime"

(Original Source : https://github.com/docker/for-win/issues/3088)

My solution: delete %appdata%\Docker\settings.json and let Docker to create a new one.

Take a backup of the file for the next time it gets broken.

<tl;dr>

I face this issue almost every month and I hope this will get fixed definitely.

Following tmBlackCape answer, I checked the %appdata%\Docker directory and found settings.json damaged (editor tells it's a binary file and of course it shouldn't).

I deleted the file and Docker Service (still running) created a new one with default values. If the service isn't running, just launch it again.

You could need to change settings (via GUI, as recommended) to catch your needs.

I made a backup copy of my custom settings.json so next time I can replace the broken one without losing custom configuration.

This happened to me after Docker Desktop upgrade to version 3.6.0 (67351), too. (Which was surprising, because it worked before the upgrade.)

Due to the help in the top answer right now, I went to the above settings directory: %appdata%\Docker, looked at the logs and deleted/renamed the file settings.json -> Docker Desktop started immediatelly ; there had been a process retrying in the background.

In the time before that, the backend.exe.log had been all "unmarshal" something something:

    settings.json: json: cannot unmarshal bool into Go struct field Content.proxyHttpMode of type string"
common/cmd/com.docker.backend/internal/settingsloader.GetSettings(0x0, 0x0, 0x0)

So, the above message 'tipped me off' as to where the actual error on start may be. Hmm...

For me deleting the folder %appdata%\Docker did not work.

Instead I had to run the following power shell command as admin.

Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All

References.

1. https://stackoverflow.com/a/63845592/1977871

2. https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/quick-start/enable-hyper-v#enable-hyper-v-using-powershell

My windows features with running docker desktop are as follows.

Go to the directory C:\Users-------\AppData\Roaming\Docker and delete the file settings.json . Docker takes care of rewriting it at startup.

This manipulation solved the problem for me !

1. Go to C:\Users\asd\AppData\Local and delete Downloaded Installation directory.
2. C:\Users\asd\AppData\Roaming and delete Docker and Docker Desktop directory.

Then start docker.

Docker failed to initialize

C:\Users[USER]\AppData\Local\Docker

C:\Users[USER]\AppData\Roaming\Docker

C:\Users[USER]\AppData\Roaming\Docker Desktop

Once deleted above directory, I didn’t have to do anything else, Docker Desktop started booting up as normal.