When I got the Haswell ultrabook from Intel, it had a Windows 8 x64 build. I eventually upgraded to Windows 8.1 but I faced issues when trying to hibernate / shutting it down. This seriously affected my hobbyist dev as a I tend to leave stuff open and hibernate the device.
So to solve the problem I tried to reinstall Windows 8.1 using USB key (using Windows 7 USB / DVD tool).. however the boot loader would just ignore it and revert back to boot selection screen. I eventually reinstalled the PC using Windows 8.1 Clean and refresh option and that works as advertised. But I had some issues when installing WP8 sdk.
I tried in vain to install it but it wouldn’t have anything. Eventually I figured I had to do a clean install of Windows 8.1 so scouring the next, I came across this post… the tool Rufus is almost identical to stock format tool crossed with usb dvd tool🙂
That worked, the UEFI bootloader finally allowed me to install using usb key however I still have the same issue with WP SDK. Turns out some certs were out of date. I again checked for root certificate update and downloaded tool from Windows Catalogue but that didn’t do much either..
so finally I reset the system date to the day I got the device.. I remember install WP SDK then and bang it installed just fine.. silly bugger