X64 Windows 8 | Sxsi

But what exactly is sxsi ?

On Windows 8 x64, the processorArchitecture="amd64" tag is critical. An x86 manifest will fail on an x64 OS unless the application is running under WOW64 (Windows 32-bit on Windows 64-bit). sxsi x64 windows 8

It populates the WinSxS folder with the exact assemblies the sxsi loader seeks. But what exactly is sxsi

In rare cases, the COM registration for sxsi becomes unregistered. Use the following: sxsi x64 windows 8