I thought I would post this here as there are still a few users encountering this pretty horrific issue which is easily fixed. This issue is NOT widespread but when it happens it can leave you thinking your computer is completely screwed and you have to reinstall. You don't need to reinstall you just need to follow some simple steps.
Hopefully there are enough key words in this post and title so that anyone encountering this issue can find it before they freak out too much.
This seems to affect people with motherboards with an AsMedia USB controller using drivers older than Jan 2017 ( < 220.127.116.11). I believe this only occurs when you plug Rift components into these AsMedia USB 3.1 ports.
It doesn't happen to everyone but when it happens it sucks. It starts off with a Blue Screen of Death (BSOD) stating that "SYSTEM THREAD EXCEPTION NOT HANDLED". If you are one of the unlucky few Windows will try to boot and you will get the same BSOD.
Sometime unplugging the Rift doesn't help and you still are stuck in the reboot loop.
Trying to get into Safe mode doesn't work. I can't remember the error but you are still stuck in a reboot loop.
I reinstalled Windows 5 times before I found this solution which is super simple.
Could you be affected by this?
This appears to ONLY affect users with motherboards with AsMedia USB controllers. It also appears to only happen very very rarely so don't be too freaked out. This post is mainly to help people who encounter the issue when the stars align in just the right way.
It is pretty easy to tell. Just check the support page for your motherboard it will usually list the USB controllers somewhere on that page. Like this for my motherboard.
I also included an example of a motherboard that does not have these controllers as well as the support page showing the latest drivers from 2015 that Asus is providing its customers. These drivers still contain the issue that can put you in a BSOD loop. Update to the latest Windows ones linked below.
Preventing this from happening to you
If your motherboard has an AsMedia USB controller update your AsMedia drivers to anything greater than 18.104.22.168 (2017-01-03) which is when the specific fix for this problem was made.
If your motherboard manufacturer is too lazy to give you updated drivers then use the latest Windows version here from April 2017
The fix for those stuck in a BSOD loop
Don't PANIC! The problem is super easy to resolve. The very basic steps are.
Detailed instructions at these two links
Why is it still happening?
Because some manufacturers (I'm looking at you ASUS) are still listing as the latest version the old AsMedia drivers which are prone to this dangerous bug for Rift users.
Some newer model Asus motherboards like mine "Asus Z170 PRO Gaming" are saying the latest drivers are the ones from August 2015, over 2 years older than the ones available from Microsoft. The updates which stop this dangerous BSOD loop happening have been out for a very very long time. What is your deal Asus?
Most other manufacturers like MSI have the more recent versions of this driver with the patch applied. Not sure why Asus is dragging their feet on this.
The original source of the fix and discussion on this issue can be found here