I just got the Z13 and find it amazing. However I did not like that it did a huge windows update at start and made a ton of updates of drivers, windows update files, MyAsus and Armory crate to a total of 70GB so I was thinking about doing a clean install. What did you need from the E-support folder?
Edit: Windows installation did not find the harddrive. Did you need any additional drivers during installation?
Edit 2: I did find it in eSupport I think it was eDriver\Software\Driver\DCH\Offline\Rapid Storage\,
however during install after first reboot it booted form the USB again so I needed to remove the USB stick for the installation to continue.
I have had some occasional freezing when it is in sleep. Needed to hold the power button to make a forced shutdown. Do you experience this?