Microsoft has now resolved an issue with many Windows 8 PCs that were not able to run the Windows 8.1 preview, but the Fujitsu ARROWS Tab series of tablets is still unable to run the upgrade.
A week of Windows 10, holograms and Exploding Kittens on Mars
Office 2016 launching this year, touch apps coming soon
Microsoft reveals the next version of Windows 10
Introducing Windows 10 for phones
Hands on with HoloLens
Download: Windows 10 build 9926