Hi! mak61,
Apparently I was also facing the same issue until I found solution in some other forum. Apparently just installing VC9, VC10, VC11 is not enough. so, I suggest first you uninstall your WAMPServer and restart the system. After that install the following packages with appropriate architecture then reinstall the WAMPServer. I hope it helps you.
-- VC9 Packages (Visual C++ 2008 SP1)--
Forum:
WampServer English