I have yet to even try Windows 8 - although I'm looking forward to doing so.
However, over on ghacks, Martin Brinkman has written an article providing a step-by-step procedure, along with some useful graphics, regarding how to create a system repair disk for Windows 8, which others here might find useful and informative.
"How to create a Windows 8 system repair disc
Windows 8 ships with options to create a system repair disc from within the operating system just like previous versions of Microsoft Windows did. What you need to know before you get started is that you can only create a system repair disc for the operating system version you are using. If you are running a 32-bit version, you can only create a disc that is compatible with 32-bit versions of the operating system.
The system repair disc can be used to boot into a recovery environment in situations where the Windows 8 operating system is not booting anymore."
Read the full article here: