bought custom pc not working

[jdm70]

hi all my son has built a custom pc with overclockers for £3850 he got it today plugged in all excited,And the pc keeps rebooting hitting temps at 100%. when i try to download anything it gives error codes and reboots hes really upset becuase he cant use it, we cant even get to the point of factory reset to see if that cures it, it goes to blue screen crashes so have to reboot nightmare

 

[jdm70]

hi i removed all the padding foam and its clear inside all fans are working my son thinks it might be the liquid cooler not working he choose the artic liquid freeze 2

 

[jdm70]

aio?