Wamp Server 2.2 Windows 7 64-bit and curl not working side-by-side configuration incorrect

If your having problems with php curl not starting using the following wamp installation:

wampserver2.2e-php5.4.3-httpd2.2.22-mysql5.5.24-x64.exe on Windows 64bit.


wampserver2.2e-php5.4.3-httpd-2.4.2-mysql5.5.24-x64.exe on Windows 64bit.

Getting curl failed to start because the side-by-side configuration incorrect?

Getting the following error in the event log?

Activation context generation failed for “c:\wamp\bin\php\php5.4.3\ext\php_curl.dll”. Dependent Assembly Microsoft.VC90.DebugCRT,processorArchitecture=”amd64″,publicKeyToken=”1fc8b3b9a1e18e3b”,type=”win32″,version=”9.0.21022.8″ could not be found. Please use sxstrace.exe for detailed diagnosis.

Download the following:


Or replace the entire PHP folder using


Replace the old php_curl.dll with the new one in \wamp\bin\php\php5.4.3\ext\

And, try starting Apache again.

Hope this helps someone!