This is a hardware issue. One piece or more is unstable.
You should run a full suite of stress tests to find the piece/s that have issues.
Programs to use and oreder to use them:
1st: Memtest86+ This program tests the system ram and should always be run first because Ram cans show up as the CPU being the issue. Run this program for 3 full passes before saying ram is stable. IF it is not it will tell you in RED on the lower half of the screen.
2nd: Prime95 run this program for no less than 3 hours but 12 hours is best. This program stresses the CPU and Ram. IF it errors and a core or more stop then the CPU is unstable. Run this on the blend test and with a temp monitoring program.
3rd: Intel Burn test This program also stresses...