Hey all, having some trouble with my PC randomly shutting off. 

Sometimes it will run fine all day and then other times like this morning it has shut off like 5 times.

I get the feeling it's a CPU issue as it sits at 99% sometimes for a while (especially when opening Google Chrome)

It will shut off every time i try to render a video from Camtasia (video editor) so i have stopped that. I presume that uses CPU only to render

What would be the best way to trouble shoot this before replacing the components?

If you agree its the CPU. Any recommendations?

Computer was built in 2013 so it's had a good life

Thanks,

Cam

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Specs: 

AMD FX-4130 Quad Core 3.80GHz Turbo Core CPU - 1.00 EA
Asus M5A97 EVO R2.0 ATX Socket AM3+ MBD - 1.00 EA
STRONTIUM Hynix 4GB 1600MHz DDR3 DIMM - 2.00 EA
SanDisk 128GB Ultra Plus SATA3 SSD - 1.00 EA
Hitachi Deskstar 3.5'' 1TB SATA 6GB/s 3 Year Warranty - 1.00 EA
Asus GT610 1GB GDDR3 PCI-E VGA/DVI/HDMI VCard - 2.00 EA
Samsung 24x DVD-RW SATA Optical Drive - 1.00 EA
Aywun A1-101 Black Micro ATX Case - 1.00 EA
Corsair VS650 ATX 650W Power Supply - 1.00 EA