Im a n00b plz help

Im a n00b plz help Specs: 8700k Asus Prime z370-p 3200mhz 16gb 1070ti 550w watercooled with a 240mm radiator. Problem!: So I loaded the preset 5ghz OC profile on the board with the xmp profile. Was fine for some weeks and the crashes started :'( Im a novice at this and I've got no idea why...

Ok so this is the problem. Recently ive been playing on steam and one day i came home to some network issues where it said i had tried to log in too many times on the network so i had to wait, odd thing is ive never logged in since all my devices uses remember password. Anyway ive waited and...