i am facing this problem and i don't know how to fix it.i have installed VCR 2010, VCR 2012, VCR 2013 and VCR 2010 (x86) on my machine but still when i want to start WAMP it gives me this message MSVCR110.dll is missing.
This snip shot is from my window control panel as you can see i have installed VCR packages.
Like @RiggsFolly said in another answer, to fix this go to this wamp page and scroll down to bottom most section and download All VC Redistribuable Packages. These zip files contain five 32 bit & 64 bit VC installers.
If you have 64bit wamp, install both 32 & 64 bit setups. Otherwise 32 bit would be enough. In some cases only latest version would be sufficient, but some times you might have to install all of them, one by one.