According to Paul Thurrott, the next version of Windows, codenamed Threshold, will be called Windows 9 and is being planned to ship in April of 2015. Thurrott is plugged in tightly to the Windows and Microsoft scenes and is blogging this on his blog, the Windows SuperSite. He also states that internally Microsoft is not pleased with the adoption of Windows 8 and is looking to wipe the slate clean with a new version number of Windows to erase the stain. Much like it needed to do after the Windows Vista debacle.