Numbers in Admistrator's Group 1

[BKearan]

I am seeing serial numbers? in my Administrator's Group. Anyone know what or why?

ie:
S-1-5-21-1173626634-1814065488-618671499-11687
S-1-5-21-1173626634-1814065488-618671499-13456
S-1-5-21-1173626634-1814065488-618671499-1711

Basically, is it very safe to remove them?

 

[vacunita]

Perhaps this can shed some light on them:

http://windowsitpro.com/article/articleid/14781/what-is-a-sid-security-id.html

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Ignorance is not necessarily Bliss, case in point:
Unknown has caused an Unknown Error on Unknown and must be shutdown to prevent damage to Unknown.

 

[linney]

Can you convert the SID to an actual user name and then make your decision? See what is listed in this location.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList

As to the why, hopefully finding out the real user name might solve that?

 

[BKearan]

Ah-ha!
Thanks, Linney.

In 3 out of 3 random checks, all instances were domain profiles that no longer existed in our Active Directory.