Go to the official Microsoft Download Center. Do not use third-party DLL download sites.
That could save hours of trial-and-error. Go to the official Microsoft Download Center
The specific link between this 2008 package and the PS Vita centers on the Content Manager Assistant (CMA) connection: the PC-based PS Vita emulator
Without this specific package, your PC cannot run the utilities needed to: Vita3K will not launch.
There is a second, albeit smaller, connection: the PC-based PS Vita emulator, .
Install the official Visual C++ 2008 SP1 x86 redistributable. Without it, Vita3K will not launch.