Thanks for ur kindly.
My panic is how does the client can login to the her own "user account" and admin/"THIS COMPUTER" account by key in the same ID & Password?
Example:
"Admin"
username: sum
password: $ab12$
log on to: pass123 (this computer)
the client account:
username: client
password: 1234
log on to: abc123
but the client aso can login by this:
username:
client
password:
1234
log on to:
pass123 (this computer)
May I know what issue will cause the client can login till like this way?
Is that the application problem or technically human fault?