Registry Data Recovery

hey guys, a couple of days ago i got a prompt at my logon screen stating

"One of the system files containing registry data had to be recovered by course of a copy or log. the recovery was successful."

Now Apparently, i was at school at the time, but my mom went into my room and saw a stop error on the computer. I didn't see it, so i don't know what happened. My computer works fine though, i just wanted to know what happened and what this prompt even means.

P.S. i've never really mess around the registry, only to change the default icons of files.

#437511