1 Locate the computer room in B3
The computer room is located on the east side of B3.
2 Enter username and password
The username for the computer is 'john' and the password is 'ada'. This information could be found in a file in another room.
3 Unlock B-2F
After entering the username and the password choose to unlock B-2f.
4 Enter the other password
You will be prompted to enter another password when you try to unlock B-2F. The password is 'cell'. You will have obtained that password after solving the show-room puzzle.
5 Unlock B-3F
Unlock B-3F now. No more passwords will be needed. (See How to get the Armor key – Resident Evil remastered)
6 Location of B-2F
The location of the unlocked room in B-2F will be displayed on the computer. It's next to a dead end in B-2f.
7 Location of B-3F
The location of the B-3F room will also show on the computer once unlocked. It's in the northwest of B3. (See How to get 003 key in Resident Evil remastered?)