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Solved Unknown Account under all Registry Keys after Clean Install
Anyone else seeing Account Unknown:
S-1-15-3-1024-NNNNNNNNNN-NNNNNNNNNN-NNNNNNNNNN-NNNNNNNNNN-NNNNNNNNN-NNNNNNNNNN-NNNNNNNNNN-NNNNNNNNNN
under ALL their Registry Key Permissions with Read Only?
It's appearing early at the very beginning of the OOBE screens, both platforms, and is persistent.
OS
Windows 10 Pro 64bit 22H2 19045.5198
Computer type
PC/Desktop
Manufacturer/Model
Dell XPS 8500
CPU
Intel Core i5-3450 CPU@ 3.10GHz
Memory
8.00 GB
Graphics Card(s)
Nvidia GeForce GT 640
Operating System
Windows 11 Home 64bit 24H2 26100.2314
Computer type
Laptop
Manufacturer/Model
Dell Inspiron 5559
CPU
Intel Core i5-6200U CPU@ 2.40GHz
Memory
8.00GB
Graphics card(s)
Intel(R) HD Graphics 520
Well-known member
Pro User
VIP
Sometimes installed software can create a user account like third-party antivirus software.
OS
Windows 11
Computer type
PC/Desktop
Manufacturer/Model
HP Pavilion
CPU
AMD Ryzen 7 5700G
Motherboard
Erica6
Memory
Micron Technology DDR4-3200 16GB
Graphics Card(s)
NVIDIA GeForce RTX 3060
Sound Card
Realtek ALC671
Monitor(s) Displays
Samsung SyncMaster U28E590
Screen Resolution
3840 x 2160
Hard Drives
SAMSUNG MZVLQ1T0HALB-000H1
Well-known member
Thread Starter
Sometimes installed software can create a user account like third-party antivirus software.
That's why it's so odd, this happened at the very begnining of OOBE even before account set up and after a clean install from a MCT USB on a TPM 2 machine with Secure Boot, so the Windows 11 installer created it very early on then removed the account leaving behind this on each and every Registry entry. Seems sloppy.
OS
Windows 10 Pro 64bit 22H2 19045.5198
Computer type
PC/Desktop
Manufacturer/Model
Dell XPS 8500
CPU
Intel Core i5-3450 CPU@ 3.10GHz
Memory
8.00 GB
Graphics Card(s)
Nvidia GeForce GT 640
Operating System
Windows 11 Home 64bit 24H2 26100.2314
Computer type
Laptop
Manufacturer/Model
Dell Inspiron 5559
CPU
Intel Core i5-6200U CPU@ 2.40GHz
Memory
8.00GB
Graphics card(s)
Intel(R) HD Graphics 520
Well-known member
Pro User
VIP
Hit the Windows Key + R button combination on your keyboard. Type in lusrmgr. msc and hit Enter. It will open the Local Users and Groups window. See if you can delete the account.
OS
Windows 11
Computer type
PC/Desktop
Manufacturer/Model
HP Pavilion
CPU
AMD Ryzen 7 5700G
Motherboard
Erica6
Memory
Micron Technology DDR4-3200 16GB
Graphics Card(s)
NVIDIA GeForce RTX 3060
Sound Card
Realtek ALC671
Monitor(s) Displays
Samsung SyncMaster U28E590
Screen Resolution
3840 x 2160
Hard Drives
SAMSUNG MZVLQ1T0HALB-000H1
Well-known member
Thread Starter
T
Hit the Windows Key + R button combination on your keyboard. Type in lusrmgr. msc and hit Enter. It will open the Local Users and Groups window. See if you can delete the account.
The account was apparently created then deleted during set up that's why it's showing up as
Unknown Account .
So there's nothing in lusrmgr.msc or under:
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList
OS
Windows 10 Pro 64bit 22H2 19045.5198
Computer type
PC/Desktop
Manufacturer/Model
Dell XPS 8500
CPU
Intel Core i5-3450 CPU@ 3.10GHz
Memory
8.00 GB
Graphics Card(s)
Nvidia GeForce GT 640
Operating System
Windows 11 Home 64bit 24H2 26100.2314
Computer type
Laptop
Manufacturer/Model
Dell Inspiron 5559
CPU
Intel Core i5-6200U CPU@ 2.40GHz
Memory
8.00GB
Graphics card(s)
Intel(R) HD Graphics 520
Well-known member
Pro User
VIP
its just the telemetry admin account. no need to worry about it. nothing shady going on here :)
Well-known member
Thread Starter
its just the telemetry admin account. no need to worry about it. nothing shady going on here :)
Thanks for the info! I don't remember seeing this under Windows 10?
Last edited: Oct 13, 2021
OS
Windows 10 Pro 64bit 22H2 19045.5198
Computer type
PC/Desktop
Manufacturer/Model
Dell XPS 8500
CPU
Intel Core i5-3450 CPU@ 3.10GHz
Memory
8.00 GB
Graphics Card(s)
Nvidia GeForce GT 640
Operating System
Windows 11 Home 64bit 24H2 26100.2314
Computer type
Laptop
Manufacturer/Model
Dell Inspiron 5559
CPU
Intel Core i5-6200U CPU@ 2.40GHz
Memory
8.00GB
Graphics card(s)
Intel(R) HD Graphics 520
Well-known member
Pro User
VIP
Thanks for the info! I don't remember seeing this under Windows 10?
oh my response was 100% facetious... sorry. cant express tone over typing...
Well-known member
Thread Starter
I guess I don't look at Registry Permissions very often as this issue goes back 4 years.
So after loading up my Registry Hives from Macrium backups going back to Version 1609, this issue first appeared with the 1703 feature update and is associated with poorly programed Appx Containers.
Registry permissions after 1703 update - Unknown Account
All these "strange" SID starting by "{S-1-15-3-1024-" are in fact pseudo accounts created for AppX containers (each AppX has its own SID).
OS
Windows 10 Pro 64bit 22H2 19045.5198
Computer type
PC/Desktop
Manufacturer/Model
Dell XPS 8500
CPU
Intel Core i5-3450 CPU@ 3.10GHz
Memory
8.00 GB
Graphics Card(s)
Nvidia GeForce GT 640
Operating System
Windows 11 Home 64bit 24H2 26100.2314
Computer type
Laptop
Manufacturer/Model
Dell Inspiron 5559
CPU
Intel Core i5-6200U CPU@ 2.40GHz
Memory
8.00GB
Graphics card(s)
Intel(R) HD Graphics 520
