The DNS Suffix Registry Fix vs Computer Name

Hi,
I have 2 computers. The info as the followings:
Computer A:
Computer name: Computer A
This computer is in the Domain called “boba.local”
 
Computer B:
Computer name: Computer B
This computer is in Workgroup called “Workgroup”
 
The consultant asked to run “The DNS suffix registry fix” to computer B.
To my surprise, there are CHANGES in both 2 computers above as the followings:
 
Computer A:
Computer name becomes “COMPUTER X “(instead of Computer A)
Member of domain “boba. Local” (Note: it does not change; it still stays like original)
When I click “MORE” at “Computer name/Domain Changes” windows, I saw the followings:
1) Primary DNS suffix of this computer is “boba.local”
2) Change primary DNS suffix when domain membership changes are SELECTED
3) NetBIOS computer name is “Computer A”
Note: I do not do anything to Computer A. I do not run “the DNS suffix registry fix” in this computer. Why does it also get “the CHANGES”? (Is it related to my profile?)
 
Computer B:
As per consultant’s instruction, I run “The DNS suffix registry fix” file to this computer B, and I saw the CHANGES as the followings:
 
Computer name becomes “COMPUTER X “(instead of Computer B)
Member of Workgroup called “BOBA AZURE” (instead of WORKGROUP)
 
When I click “MORE” at “Computer name/Domain Changes” windows, I saw the followings:
1) Primary DNS suffix of this computer is “boba. Local”
2) Change primary DNS suffix when domain membership changes are SELECTED
3) NetBIOS computer name is “Computer B”
 
There are around 100 computers in the company.
 
Questions:
1) What is the goal of this “the DNS suffix registry fix” file here?
2) Would all 100 computers in the company be having the computer’s name as COMPUTER X?
3) Any other additional explanation related to this registry fix?
 
Thanks,

Tjie