Windows 10: Unknown account on fresh install

Just built a fresh r5 5600x 3070 tower crucial m.2 1tb all new parts as far as I'm aware. But when Installed windows there is already an account there that I do not know and its asking for a pin but it says pin unavailable. It won't let me add a new account or access anything to get into the pc

:)

 

Unknown accounts ?

On several fresh W10 (HOME and PRO) installations, while tweaking permissions, an "unknown account " is listed in addition to the usual Trusted Installer, Administrators, Users, System, etc.

It's understood that 'S' accounts are security descriptors, and most are shown as, simply, S-1-xx-x-xxxx and so forth. Here's an example of an "unknown" as copied from permissions settings...

Account Unknown(S1-15-3-1024-1065365936-1281604716-3511738428-1654721687-432734479-3232135806-
4053264122-3456934681)

I don't believe that those are functional, and often they can be removed seemingly without negative consequences.
The underlying query is: why are they created?

 

Local account installation question

I'm fairly certain that Skip this step was available in 10.0.130 - the workaround in Step 20 (back button) is no longer required.

The currently known, as of 10.0.130, ways to create a Local account sign-in are

• Skip this step at the MS account creation phase
• No Internet connection during the install
• static IP (post# 2 by Fragment) - New (to me anyway)

 

Remove account

I suggest you backup your personalized files first before removing the account.
To delete an account, follow these steps:

1. Press WIN + X keys and click Command Prompt (Admin) from the menu.
2. Type the following command and press Enter. Replace test with the name of your sister's account. Code: