Windows 10: files altered by extra device microsoft account

Another device is synced to my microsoft account.

Files on my hard drive, cloud, and email attachments have been altered.

How do I show which device made those changes?

:)

 

Unknown devices on my Microsoft account

Hello Flemmingk,

Could these other devices be from friends that you may have signed in to your Microsoft account on for something?

Either way, you can remove these devices.

*Arrow Microsoft Account - Remove Devices User Accounts Tutorials

Afterwards to be safe, I would recommend to change the password of your Microsoft account, and enable two-step verification if you haven't already.

Change Password of Account in Windows 10 User Accounts Tutorials

Turn On or Off Microsoft Account Two-step Verification User Accounts Tutorials

 

Unknown devices on my Microsoft account

Thanks Brink
I get different reactions every time I try to delete a device, but the result is that I cannot remove the devices.
I'll go back to local accounts and delete the Microsoft account.
I changed to Microsoft account because I wanted to use the Continue on PC feature. This feature doesn't work so I think that I'll just forget about it.
Thanks for your interest.

 

Remove account

I suggest you backup your personalized files first before removing the account.
To delete an account, follow these steps:

1. Press WIN + X keys and click Command Prompt (Admin) from the menu.
2. Type the following command and press Enter. Replace test with the name of your sister's account. Code: