Hello,
Could you please clarify whether you want to switch the Microsoft account you use to sign in to Windows, or transfer your existing Windows user profile, files, and settings to another Microsoft account?
Please note that you cannot merge two Microsoft accounts.
If you want to switch the Microsoft account used to sign in to Windows,
- Click Windows + R key, type netplwiz, and click ok.
- Click Add > Sign in without a Microsoft Account (Not recommended).
- Click Local account.
- Create a temporary local user account.
- Once created, select the new local account created in the netplwiz window and click Properties.
- In the Group Membership tab, give the administrator permissions.
Once done,
- Sign out and sign in to the newly created local account (Profile).
- Go to Local disk C :/Users/Your old user profile.
- Copy all the data from your old user profile to the new profile.
- Now, all of your data will be transferred to the new local admin profile.
If you want to remove your old User profile,
- Open the netplwiz window from the local admin profile.
- Remove the old user profile.
Now, sign in with the Microsoft account you want to use on your PC.
- Go to Start > Settings > Accounts > Your info > Sign in with your Microsoft account instead.
So, you have now changed your Microsoft account on the Windows PC that has all of your previous profile data.
Let me know if you still need more help.