C++ Redistributable

I (or my uninstall check program - Wise Program Uninstaller.rar) inadvertantly deleted some dll's and need to fix that. The problem is with the C++ redistributable.
It is looking, inter alia, for the file VC Runtime 140.dll
I am on Windows 7 on a x64 PC
Which version of the redistributable must I install?

Thanks
PK