I've just bought a Lenovo ThinkPad and it came preinstalled with Windows 7 but had Windows 8 Pro license. I just used the Operating System Recovery Disk Windows 8 Pro DVD to install/recover OEM Windows 8 Pro and it worked albeit a long process with many restarts and some bloatware along the way.
On my desktop I'm already using Windows 8.1 and I kindda got used to added features that Windows 8 lacks (login to desktop, quasi Windows menu etc.). I would like to do the same on this laptop as well.
If I install Windows 8.1 on my ThinkPad while subsequently repartition my disks including my mSATA SSD cache that this machine uses. I can download ExpressCache later from Lenovo's site to enable SSD caching on Windows 8.1.
The question is whether I'll be able to restore back to OEM Windows 8 using DVD media if something goes rotten with Windows 8.1 and won't work as exected? Will those DVDs to restore OEM OS work after repartitioning my disks?