hey that means you have gotten back your password !!
in the security world we call this an attack from a disgruntle employee. may be his boss is owing him or something like that. most of us concentrate on ly on external threat at the expense of internal threats. thank your star that this employee did not plant a logic bomb( codes that crash a system in a future date after he has long gone ). now you need to hardened your windows box.
terminal service have tendencies of changing settings that is why in the process it prompt you to choose a security level.
