Weird Account's Issue

To confirm that the given user folder path belongs to the relevant username:-

In all steps, ignore user 'accounts' called DefaultAccount, defaultuser0/1/…, Guest, WDAGUtilityAccount

Step 1 Run this command

Code:

wmic useraccount get name,SID

This tells you the SID for each username.

Step 2 Run RegEdit, go to
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList

Step 3 For each of the SIDs in the Registry SubKeys beginning S-1-5-21, select it and look at its ProfileImagePath entry.

Step 3 shows you which SID relates to the given user folder path & the results of Step 1 tell you which UserName that SID relates to.


All the best,
Denis

Thanks for the followup. I found the profile. It's under his sisters name with a .bak at the end in the registry. That's his account when he logged in under his name it would show her name. I changed the name to his name and that somehow disabled this account. Is it possible to get it back active and change the name back to my son's name?

Personally, I'd never change an account name. I'd create a new account with the desired name instead & delete the old one.
But here's how to do it
Change User Name - TenForumsTutorials

Add Local Account or Microsoft Account - TenForumsTutorials
Change Account Type [Standard-Admin] - TenForumsTutorials
Delete User Account - TenForumsTutorials

And, just for info, here's how to change a user folder path
Change Name of User Profile Folder - TenForumsTutorials
I'd never do this either. I'd create a new local account with the username I wanted in order to create that folder path.

And here's an example of handing user account .bak entries
Fix User Profile Service Failed the Sign-in Error - TenForumsTutorials
I'm only posting this link because you mentioned a .bak entry and I think this tutorial explains the situation quite decently.

I suggest you start again from scratch. Create a local, password-protected Admin user account for your son.
And create an additional [spare] local, password-protected Admin user account so you can be confident of getting back in control of the computer if his Admin account ever gets corrupted.
my ditty - Create two spare local, password-protected Admin accounts [post #2] - TenForums

Best of luck,
Denis