why does my computer maintain turning past its sell-by date after give or take a few 10 mins or so? could it be the power supply?

it also take about 5 or 10 mins until i can turn it spinal column on....what up with this...it works great excluding that.

why does my computer maintain turning past its sell-by date after give or take a few 10 mins or so? could it be the power supply?

It could be the powersupply, but sounds more like your computer is entering thermal protection. I would suspect a doomed to failure fan surrounded by the powersupply, case, or cpu.
same article happened to me. It turned out that the rugged disk was dog-eared. You should take your computer to be checked and repaired. It is extremely $$$$$$$$$.
Most likely the cpu cooling adherent has stopped and the cpu is over heat. The BIOS is programmed to monitor the temperature of the cpu. It will shut down the computer if that warmth exceeds a certain issue.
something is probably overheating
Nothing to worry,It's due to the certainty that you have setup the computer approaching that.Right click on the desktop and go to properties and select screensaver tab and click the power button.See the settings,if anything in the neighbourhood Turn off tough disk say 10 min,conveyance it to some more additional time or click never.Same entity for others also,if you know what they are.Since you are saying your computer is working great,this could be the problem.
If you right click on your space page a box will appear.Click properties you will see a screen that handle all your startup and shutdowns!