RAPI.dll was not found error

I have a new HP tablet/notebook running Windows Vista Home Premium. When I start it up I get the error message “Wmdsync.exe – unable to locate component. This application failed to start because re. Re-installing the application may fix this problem”.

I suspect it happened because I installed ActiveSync, then realised I didn’t need it, then uninstalled it. I have tried installing the latest version of Windows Mobile Centre, but it has not fixed the problem. Any advice please? Regards Wendy

Hi Wendy,

The problem is ActiveSync still want to start but Vista, correctly won’t let you install the required dll.

To fix the error message, open the system configuration tool, select the Start Up tab and take the tick off Wmdsync.exe. ThisĀ  will fix the error message.

You may need to install the Windows Mobile Device Center which is the Vista replacement for Active Synch. You can get the latest update from the Microsoft website.


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