However, after a few RT devices incurred problems downloading the upgrade Microsoft pulled back the Windows 8.1 upgrade for the device over the weekend and issued a note that read as follows:

"Microsoft is investigating a situation affecting a limited number of users updating their Windows RT devices to Windows RT 8.1. As a result, we have temporarily removed the Windows RT 8.1 update from the Windows Store. We are working to resolve the situation as quickly as possible and apologize for any inconvenience. We will provide updates as they become available."

Read More: Microsoft Windows 8.1 now available for download

RT 8.1 is an operating system for tablets and light, thin personal computers. It only runs built-in apps or apps downloaded from the Windows Store.