I’m going to be on a plane for 12 hours Monday when I fly to Taiwan, so I figured I might as well do some php-mysql development to pass the time. In preparation, I installed the latest mysql 4.1.8 windows build onto my laptop, but when it came time to install the service, I ran into the error message:

“Resource messagedlg_confirmation not found.”

After some digging around I figured out that when my previous mysql 4.0.x was uninstalled, the existing service was not removed. Thus, when mysql 4.1.8 tried to install itself as a service, the previous installation was causing it to throw the error. So I removed the following two keys from the registry:

HKEY_LOCAL_MACHINE > SYSTEM > ControlSet001 > Services > MySQL
HKEY_LOCAL_MACHINE > SYSTEM > ControlSet002 > Services > MySQL

Then I restarted, tried the configuration wizard again, and this time it successfully installed the mysql 4.1.8 service. I’m writing this for others out there who are running into this error when installing mysql 4.1.8. Hopefully this will save you some time.