Strange squealing noise from computer

So just to be fair this is NOT a Debian specific issue as I run several distros including Debian and Windows10. I have a recently built DIY computer that is making a LOUD squealing sound. I thought of fan bearings at first and I tried individually stopping each fan to see if the noise stopped on

Lightening Hit screwed boot sequence on Stretch

I have a stock Stretch system actually with  a multiple boot to different hard drives via grub2. It has been running well for over a year even longer since I rebuilt with new Motherboard and upgraded from Debian 8.I am currently able to boot a Windows 10 drive and 2 Debian 9 drives. However the

GPG and keyring issue

I just installed a new Debian 9 system on a reformatted disk in a multidisk system. I used the Netinstall cd from Debian. Installation went ok and I am sending this from the system. Problem is I tried to add the contrib and non-free repos to synaptic i.e. apt sources.list  I simply copied the s