Question Hibernate puzzle

[Novel8]

I rarely used the hibernate function, but i did this morning. About an hour later, I went to my desktop to resume where i thought i had left off, but was greeted by my name and that win 7 was locked. I never had anything to do with lock or unlock. The only way out of this was to shut down and reboot windows. Any ideas why I had this situation and hope not to repeat it, if and when i hibernate my system.

 

[SkyNetRising]

I went to my desktop to resume where i thought i had left off, but was greeted by my name and that win 7 was locked.
I never had anything to do with lock or unlock.

You enter your password and unlock it.

 

[ex_bubblehead]

As above. This is how it's supposed to work. If you don't have a password then simply hit enter to log in.