You seem to try to install the 64 bit version of PlaneShift; are you absolutely sure that you have a 64 bit Windows? If not, better try the 32 bit version, it is probably compatible enough to run on both 32 and 64 bit Windows versions.
If the installer doesn't work even after repeating the installation after a reboot, you may download a matching Visual C++ 2008 Runtime from Microsoft and try to install that, then PS again.