There are quite a few questions out there regarding upgrading to Windows 8.1 and then running into a BSOD and then subsequent reversion back to Windows 8:

1. [Windows 8.1 couldn't be installed with error 0xc1900101 0x20006](https://superuser.com/questions/661465/windows-8-1-couldnt-be-installed-with-error-0xc1900101-0x20006)
2. [Windows 8.1 upgrade fail with error 0xC1900101](https://superuser.com/questions/662163/windows-8-1-upgrade-fail-with-error-0xc1900101)
3. [windows 8.1 upgrade from win 8 fails with error code 0xc1900101-0x20017](https://superuser.com/questions/668521/windows-8-1-upgrade-from-win-8-fails-with-error-code-0xc1900101-0x20017)
4. [windows 8.1 upgrade fails with error code 0xc1900101-0x20017](https://superuser.com/questions/661311/windows-8-1-upgrade-fails-with-error-code-0xc1900101-0x20017)
5. [Windows 8.1 will not boot after upgrading from Windows 8 on my PC](https://superuser.com/questions/665438/windows-8-1-will-not-boot-after-upgrading-from-windows-8-on-my-pc)
6. [BSOD after installing old driver in Windows 8.1](https://superuser.com/questions/694161/bsod-after-installing-old-driver-in-windows-8-1)

I'm sure there are probably others out there that I haven't found. I would like to create single question that would be similar to what we've done with other common questions where we post the question and a community wiki answer. We would then close these questions as a duplicate of the new one. This would preserve any reputation earned from the older posts, while giving a more succinct and clean solution to a common problem at hand. What does the community think?