An operation to partition the C drive on my brother's new Toshiba UEFI-equipped laptop, while it all appeared to have worked OK, then refused to allow the machine to re-boot. None of the repair, reset, refresh, system restore operations would run. And no, he hadn't created any recovery media.
So to allow him to retrieve his files etc, I did a rough, non-activated install yesterday, using my Win 8 Pro disk (original introductory reduced-price version) which got his files etc back but was obviously never going to activate and be legal. Subsequently, last night I downloaded this as an ISO, created a USB install media, and used it today to re-install Windows (8.1 Core) for him. It virtually fell onto his system, picked up the embedded product key out of the UEFI BIOS with no problem, and activated immediately upon connecting to the internet.
And as a side benefit, the install routine did pick the re-partitioned drive (2 x 350GB partitions), allowed me to blitz his original factory recovery partitions, and allowed the installation to proceed on the 350GB C: partition while the second partition remained unallocated. Once installed, I used Disk Management to successfully allocate and format the D: partition. A re-boot proved successful, so he did get his two partitions after all, with the added bonus of a clean install with no factory carp-ware or bloatware.
So my brother is very happy. As am I, because I grabbed the 8.1 Pro ISO for myself as my current setup is Windows 8 Pro (with WMC) upgraded to the 8.1 RTM, which subsequently upgraded itself to Win 8.1.1, making for a very involved and convoluted setup indeed. At least now I know that I won't have to go through it all again should I ever need to do a re-install (between now and the release of a usable W10 beta - the current build is nice, but nowhere near ready for prime-time). I will still have to use a product key though as my BIOS is not UEFI.
All is good.
Wenda.