Windows 10 x64 released August 2015 - same issue arising. MSVCR110.dll is also found in the sysWOW64 folder (which is where I found it, copying to system32 does not help). To resolve:
uninstall the x86 versions of VC 11 vcredist_x64/86.exe for 2012 and 2013
uninstall WAMP Server 2.5
delete (maybe back up first) the WAMP folder
restart windows
reinstall WAMP 2.5
Hopefully like me you have a MySQL database backup handy!