Uninstall the VC runtime. Remove any vcomp100.dll files which are on your computer. If you start dolphin, it should complain about the missing vcomp100.dll file. If it doesn't, there still is one lying around in any of your PATH directories or in the Dolphin path. Find the file and remove it until starting Dolphin complains about the missing vcomp100.dll file.
Then, install the CORRECT VC runtime and try again.
Then, install the CORRECT VC runtime and try again.