Windows 10: why did my log in details for microsoft account turn up on my G/friends computer?

My Girlfriend got a new computer, we set it up, we use the same broadband, and when we went to set up her microsoft account all my log in details came up on where she should log in, we have different email addresses but mine automatically went on to the new one we were creating.i i actually logged in and my one drive was there my photos, skype, excel even my xbox account. she hase a chromebook and i have a Windows 10.

:)

 

New 2-Step Verification options for G Suite accounts

Source: G Suite Updates Blog: New 2-Step Verification options for G Suite accounts

 

New 2-Step Verification options for G Suite accounts

Source: G Suite Updates Blog: New 2-Step Verification options for G Suite accounts

 

Huge problem - My Microsoft account was added to a friends computer as THE ONLY account

Hi,

If you've unintentionally added your Microsoft account to a different computer, you have the option to remove it by simply signing in to your Microsoft account. Here's how you can do it:

• Sign in to your Microsoft account
  here.
• Click your friend's computer name under Devices.
• Select Remove PC.

By doing the steps above, your friend will lose his access to the entire account and will be asked by the system to create a new one. He'll no longer be able to access all files and apps your account currently has.

Let us know if it addressed your concern.

Thank you.