The move is a further distancing of Microsoft from its old chum Intel, but shows how keen the Imperium is to get into the tablet market.
For years the Imperium made tablets which were like keyboardless PCs running Windows. However, these failed. Then along came Apple's Steve Jobs and convinced the world that the tablet model should be based on keyboardless netbooks and the whole lot took off.
The only problem for Microsoft was that its software was configured for Intel chips and tablets appear to mostly have chips designed by Arm under the bonnet.
Now it seems that the Imperium is working on a version of its core Windows operating system for devices such as tablets.
Both the Wall Street Journal and Bloomberg have reported how the Imperium plans to unveil a version of its operating software that runs for the first time on ARM processors.
This will be a move away from the "X86" designs favored by Intel, although it is not clear when this will come to market. Intel, of course, has several ARM licences.
Microsoft said this week that more than 1.5 million mobile phones carrying Windows Phone 7 operating software have sold in the first six weeks of launch, meeting what the company called "realistic" expectations.