This past week Microsoft announced that Windows 8.1 Update 1 will be rolling out this Spring. The company however, didn’t give us a specific date. But according to Wzor, which has a pretty decent track with leaks and rumors, Microsoft will be making the final build of the said update available to MSDN subscribers sometime during late March, with public availability on April 1st. Windows 8.1 Update 1 will supposedly make the operating system simpler for keyboard and mouse users. No exact date from Microsoft has been revealed yet and the BUILD Developer Conference begins April 2nd.