@sharongooner wrote:

Motherboard 46 c CPU1 66 c Temp3 59 c CPUO core 82 c

HDD 42 c

Is my system too hot?

Good grief Sharon yes, wayyyyyyyyy to hot. No wonder it,s shutting down. Download this helpful little utility. It,s a diagnostic tool that tells you allsorts of useful info about your system, including the inner temp of it. Mine is currently 37c. And do what KT suggested and take the sides off and give the fan a good clean. You,ll be amazed at the amount of dust inside it.
http://www.5star-shareware.com/Windows/Utilities/Benchmarks/aida32pe.html%5B/color%5D