Fixes issues in which the Windows 8.1 or Windows RT 8.1 upgrade information is not visible in Windows Store. お客様からのお問い合わせが多い内容をQ A形式でご紹介します。ご質問内容:Windows 8からWindows 8.1へアップデートできない. Last updated on May 4th, 2015In a previous tutorial I had described how you can update Windows 8 to Windows 8.1 using the Standalone installer (Windows 8.1 Update.