If you have a new Windows 8 or RT tablet or PC and want to upgrade to the preview version of Windows 8.1, you might not be able to, at least not at the moment. Microsoft has a new blog post that talks about the install process for the preview build of Windows 8.1 that at the same time offers up a list of PCs that can't handle the upgrade at the moment.
The blog post states:
Please note: Some tablets and PCs running newer 32-bit Atom processors require updates to their graphics drivers before they can run the Windows 8.1 Preview. Those tablets and PCs include the Lenovo ThinkPad Tablet 2, ASUS VivoTab TF810C, HP Envy X2, HP ElitePad 900, Samsung ATIV Smart PC, and Fujitsu ARROWS Tab. We are working closely with Intel and OEM partners to deliver updated drivers that will allow you to install the Windows 8.1 Preview as soon as possible.
In addition to the above PCs, anyone with a Windows RT tablet or PC that also has installed a language pack are being asked not to download the Windows 8.1 preview. Microsoft did not state the specific problem that has caused this issue but the blog did say that a fix for this bug is in the works.
Source: Microsoft | Image via Microsoft