How can I tell if someone has got past my password and go on my computer

[jagdavis98]

My computer did not shut down correctly and when this happens when I turn it back on I usually have a black screen when I turn it back on and have to hit enter for it to come on. Well I didn't have to do this this time and I am thinking someone got into it.

 

[WR2]

Hello jagdavis98;

Have you changed your password?