PC random cutting out.

[Turrel81]

Recently for a couple of months now my pc seems to trip at random times, i have eliminated the PSU as i have fitted a spare one which hasn't solved the problem.
the other suspect could be the main socket, as when i fitted a usb 2 gang switch we used a 2 mil earth wire, which would be better to use 4 mil instead.

My specs
Operating System: Windows 10 Pro 64-bit (10.0, Build 17763)
System Manufacturer: ASUS
System Model: All Series
BIOS: BIOS Date: 04/27/15 10:10:13 Ver: 24.01 (type: BIOS)
Processor: Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz (8 CPUs), ~4.0GHz
Memory: 32768MB RAM
Available OS Memory: 32700MB RAM Card name: NVIDIA GeForce GTX 1060 3GB

--------------------
Drive: C:
Free Space: 419.9 GB
Total Space: 475.6 GB
File System: NTFS
Model: Samsung SSD 850 EVO 500GB

Drive: F:
Free Space: 74.2 GB
Total Space: 114.5 GB
File System: NTFS
Model: SanDisk SDSSDA120G

Drive: G:
Free Space: 1037.0 GB
Total Space: 1907.7 GB
File System: NTFS
Model: Samsung D3 Station USB Device

Drive: E:
Model: Optiarc DVD RW AD-5260S
Driver: c:\windows\system32\drivers\cdrom.sys, 10.00.17763.0001 (English), 9/15/2018 08:28:17, 165888 bytes

Drive: D:
Model: ELBY CLONEDRIVE SCSI CdRom Device
Driver: c:\windows\system32\drivers\cdrom.sys, 10.00.17763.0001 (English), 9/15/2018 08:28:17, 165888 bytes