Installing Helix MP3 codec has crashed

I have installed version 14 references and uninstalled the registered version 12 on my computer. Installing Helix MP3 codec has crashed and gone into an endless loop but before that I was able to add wmv. MSVCP71.dll is missing from your computer; and the program can’t start are the error messages appearing. To fix this error, I have tried reinstalling the program. What reason does this error come from?

Error:
The program can't start because MSVCP71.dill is missing from your computer.
Try reinstalling the program to fix this problem.
