Microsoft co-founder Paul Allen said he found Windows 8 puzzling and confusing initially, but is confident that users would eventually learn to like the new operating system. In a post to his personal blog Tuesday -- strangely titled in the third person as, "Paul's take on Windows 8," Allen said he has been running Windows 8 Release Preview -- the public sneak peak Microsoft shipped May 31 -- on both a traditional desktop as well as on a Samsung 700T tablet.

 The latter, designed for Windows 7, not its successor, has been handed out or loaned in quantities by Microsoft to developers, analysts and members of the press in an effort to convince them to create software, or try out the touch-first features of Windows 8.

"I did encounter some puzzling aspects of Windows 8," Allen wrote, and said the dual, and dueling user interfaces (UIs), were confusing.

"The bimodal user experience can introduce confusion, especially when two versions of the same application -- such as Internet Explorer -- can be opened and run simultaneously," Allen said.