システム更新準備ツール (KB947821) [2011 年 8 月]
http://support.microsoft.com/?kbid=947821

Windows 7 SP1
http://www.microsoft.com/downloads/ja-jp/details.aspx?FamilyID=44e15787-66b0-4e9c-9c3b-1fc9ea40f69f
http://download.microsoft.com/download/4/7/A/47A0F7B9-1F0F-41B0-AA42-00FD16337268/Windows6.1-KB947821-v14-x86.msu

Windows 7 for x64-Based Systems SP1
http://www.microsoft.com/downloads/ja-jp/details.aspx?FamilyID=914fbc5b-1fba-4bae-a7c3-d2c47c6fcffc
http://download.microsoft.com/download/E/8/D/E8DAA970-1036-447F-B5EA-716D4BA70EC5/Windows6.1-KB947821-v14-x64.msu