Unknown User Accounts Like S-1-5-21-1956894 ....

[win7]

There are a lot of internet questions about techniques for getting rid of "Unknown Accounts?" that have total control over some directories, with names like S-1-5-21-1956894 .... .

My question is different.
IS MICROSOFT STILL USING THIS INFORMATION????

The folders (modified 2004) have MicroSoft stuff in them. One is a supplimentary EULA for MicroSoft Operating Systems. In 2004, I reinstalled my XP OS on a new machine after a CPU/MoBo hardware failure.

Does anyone know if this EULA is still relevant?
I want to delete junk folders, but not defeat MS security.


Detailed Info:
The folders look like this and were owned by "Unknown Accounts?" with name S-1-5-21-1956894 ....

C:21771815ad75f4..... (folder with padlock)
...empty.cat
...spmsg.dll
...spuninst.exe
...wmp.dll
...update (folder)
......custdll.dll
......eula.txt
......kb837272.cat
......spcustom.dll
......spupdsvc.exe
......update.inf
......update.ver

 

[win7]

Further analysis shows that S-1-5-21-1956894 .... is an "Unknown Account" that has "Special Permission" (inherited).

This one is on a foler in the C: drive that I created.
Who is this?

Plus, I have found another Unk Acct (S-1-5-32-547) on the WUTemp folder.

 

[win7]

Oh well, by taking ownership of those files, folders, apps, dlls, ... I was eventually able to revoke permissions from the S-1-5-.... Unknown Accounts and delete them all.

So far everything seems to be working okay.