Upgrading to Windows 8.1 (Preview) [My Experience]
I downloaded and installed the Windows 8.1 Preview from here:
NB The download is 2.4GB! My device is an Intel Ultrabook running 64bit Windows 8
This was my experience:
Not sure what the deal is with the crazy fonts?
NB When you use a mouse to hover over the download you should get a percentage completed dialog (during BUILD the downloads are quite slow!)