|Your answer depends on your "at work" situation.|
If this is some-one else's workstation then leave it alone.
If your work has an IT support department then ask them for help.
If you own the system then why don't you know the user ID & pwd?
Something sus about your request and we may not be able to help unless you provide more information to confirm you have a legitimate right to access the system.
Goin' Fishin' (Some day)