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How can I remove this Account Unknown(S-1-5-21-2960736033 from my Grounp or user names?

2014/08/15 22:26
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I started to notice this issue a few days ago, I just uninstalled a few programs like, Pinnacle Studio ver 14, 16, and 17.5 Keep Studio 15 and had to reinstall a few times to get it to run properly.
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Answered by
2014/08/15 23:51
Hi Kevin,

This is most likely a security setting left behind by a user account that was deleted. This is why Windows is unable to retrieve the account info and shows "Account Unknown" instead.

Referring to your screenshot, you can safely delete the reference by selecting the Account Unknown listing under Security, clicking the Edit button, selecting the "Account Unknown" entry again and hitting the Remove button. Click OK and you're done.

For a more permanent fix, right click on My Computer, click Manage, expand "Local Users & Groups" and then click on Groups.

On the right pane you see, go into Administrators or Users. You will see the Security Identifier (SID) from the Account Unknown entry. Just select and remove the account. And you should be all set.

Let me know if this works for you.

Good luck,


Answered by
Lokesh Yadav
2015/09/02 03:03

0 votes

Hi Kevin,

Go to the Start Search box, type in Regedit.
Scroll to : HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\ProfileList

If you click on the SID (Security Identifier) in the left pane, on the right pane, go to Profile Image Path and it will show you the name of the user.
Example: ProfileImagePath - C:\Users\Administrator.
If you can match the SID, then you can delete that user.
Don't delete if you are not confident of deleting the correct user account.

Be sure to make a backup of your registry or a system restore point before making any changes in the registry.

I hope this helps.


2018/04/21 14:00
Your comment is very logical, and that's why I did it, it lets me delete that user, but when I go back to open properties it reappears.
2018/04/21 14:01
I need to tell me that another part of the record I should delete that user
Commented by
opera jw
2019/07/18 07:44
I was at my place (I do not know from when):
- account unknown (s-1-5-21-329068152-2000478354-839522115-1003)
- account unknown (s-1-5-21-742219865-2982450446-2180859989-1005)
They have all but special rights.
They are not in the Users in Computer Management nor in the registry.
Can not be deleted in Security> Edit
"because this object spans permissions after its parent object, in order to delete it should disable rights inheritance"

- account unknown (s-1-5-21-742219865-2982450446-2180859989-1006)
Has the following permissions: Read and execute; Reading

However, they were not in the properties on partitions.
I thought maybe they are in some superior directory.
And it was like that.
I opened in turn:
> Properties
> Advanced
> Owner
and here was the account unknown (s-1-5-21-329068152-2000478354-839522115-1003)
> Edit
I clicked on my account
I selected: Replace the owner for subfolders and objects
> OK
Then in security
> Edit
I marked
account unknown (s-1-5-21-329068152-2000478354-839522115-1003)
> Delete
and the same with the next ones
And now, for some time, he made changes.
Then unnecessary accounts were gone.

I do not know if the first act of transferring rights was significant.
I did not move the other two and it was also possible to remove them.
Probably because you can delete only in the folder (directory) from which they go into subfolders.


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