Computer hibernation-cannot get back into desktop

Typically I leave my computer on when I leave my home office for a few hours, and the computer goes into hibernation mode. What's happening more frequently now is when I return, I cannot get back into desktop mode. The fan sounds much louder, and the only solution is to unplug the power cord in the back of the computer, and re-boot it, which always works.

Is there something I can do to avoid this situation of loud fan noise and not being able to access the desktop without unplugging?