Issues with my MSI Z270 Krait w/ cpu I7 7700K

Jul 5, 2018
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Hello,
Last couple of weeks, i started facing this weird issue: for some unknown reasons, sometimes my pc won't start (motherboard's leds light up, fans start spinning but cpu seems to fail since it is indicated by the mobo EZ Debug cpu led). after several turn offs/ons it might eventually boot. sometimes, the pc boots on the first try, sometimes, it takes like 30 times to start...

So i tried to disassemble/reassemble my entire pc, clean off the dust, it helped for the first 2 days and then the same problem showed up again.

I am running out of ideas on how to find a permanent solution to that and i didn't find any similar problem encountered by other people over the internet.

CPU: Intel Core i7-7700K 4.2GHz Quad-Core
CPU Cooler :Enermax ETS-T40-TB 86.7 CFM
Motherboard: MSI Z270 KRAIT GAMING ATX LGA1151
RAM: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-3200
Storage: Samsung 850 EVO-Series 250GB 2.5" SSD
Western Digital Caviar Blue 1TB 3.5" 7200RPM
Video Card: Gigabyte GeForce GTX 1060 6GB 6GB Xtreme Gaming
Power Supply: Silverstone Strider Plus 600W 80+

Any help from you guys would mean a lot to me.
Thanks in advance