Restarts lead to NoSymbol (\) on gray

[Aquaporin]

I have a MacBook Pro 15" latest gen, and whenever I restart or shut down and turn back on I get the screen below (this is not my screen). I have to safeboot then restart to log on. How can I fix this?

 

[CainFool]

This happened to me when I tried to change some apple data All I did was go to Startup Disk and select what your startup disk is.

 

[Aquaporin]

This happened to me when I tried to change some apple data All I did was go to Startup Disk and select what your startup disk is.

Thanks! That fixed it.

 

[Aquaporin]

Grrr... did it again.