What are the defaultuser100000xxx folders?

Those are temporary folders leftover from installing Windows. Setup (the pet name for the Windows installer) is supposed to delete them, but doesn't always do so. I suppose you could call it a bug, but it's harmless.

To view the details of all active accounts, at a command prompt type:

wmic useraccount list full

and press Enter. You'll see that there is no actual user account for the 'defaultusers.'

I simply deleted my defaultuser folders. You can too.

net user UserAccountName /delete does not work. Gives an error that the account does not exist. I deleted the folder from the elevated command prompt via rmdir.

I just noticed a number of defaultuser folder under the c:\Users folder:

defaultuser100000

defaultuser100000.MY-PC

defaultuser100000.MY-PC.000

defaultuser100000.MY-PC.000.001

defaultuser100001

Are these folders needed? If not, how can I remove them?

Windows 10 Home, Version 1903 (OS Build 18362.592)

In the elevated CMD window, type:

net user UserAccountName /delete

where "UserAccountName" is replaced by the name of the user you want to delete.

Everything associated with that name will be deleted.

I just noticed a number of defaultuser folder under the c:\Users folder:

defaultuser100000

defaultuser100000.MY-PC

defaultuser100000.MY-PC.000

defaultuser100000.MY-PC.000.001

defaultuser100001

Are these folders needed? If not, how can I remove them?

Windows 10 Home, Version 1903 (OS Build 18362.592)

In the elevated CMD window, type:

net user UserAccountName /delete

where "UserAccountName" is replaced by the name of the user you want to delete.

Everything associated with that name will be deleted.

Are these folders needed?????  Why delete them?