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https://www.tenforums.com/tutorials/89060-change-name-user-profile-folder-windows-10-a.html
Sign out the user account (ex: "Brink2") you want to change the name of its user profile … Sign in to any administrator account on the PC that you are not changing its user profile … Open a command prompt. Type the command below into the command prompt, and press Enter. Make note of the SID … Press the Win+R keys to open Run, type regedit into Run, and click/tap on OK to open …
Sign out the user account (ex: "Brink2") you want to change the name of its user profile …
Sign in to any administrator account on the PC that you are not changing its user profile …
Open a command prompt.
Type the command below into the command prompt, and press Enter. Make note of the SID …
Press the Win+R keys to open Run, type regedit into Run, and click/tap on OK to open …
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