Hello everyone, I've noticed that at times I had to turn off my computer manually instead of seeing it automatically shut down. Is this a problem? I sometimes get a message after my hard drive turns off stating to hold the power button for several seconds or restart, etc. If somebody knows about this, can you please list any ideas in how to fix this? Thank you.

The title of this thread was improperly phrased. It is not the result of a computer problem that is causing my system to ask for a manual shutdown.

Another issue I am having in addition to this one, is how come I don't have a Startup disk info section in the "About this Mac" graphics? Screenshot attached. Thanks.