For 32-bit editions of Windows, the System Type value is x86-based PC.For 64-bit editions of Windows, the System Type value is x64-based PC.
A second update scheduled for that date, Update for Windows 7 and Windows Server 2008 R2 (KB2923545), will "resolve issues in Windows", and has not yet gone live.
Windows 8 users may want to download Fix Win v2 for Windows 8.
NOTE: Windows 10 users may want to download Fix Win10 for Windows 10. Fix Win v 1.2 has been released which includes some minor bugfixes and UI changes.
The download links mentioned below point to Fix Win v 1.2 now.
Existing users will see a message that they will no longer receive updates because their operating system is unsupportted.