Unexpected error 0x8ffe2740 occurred

I realized that this happened when I try to start IIS when Apache web services has started (from XAMPP). When I stop Apache, I can start IIS.

And, vice versa, if I have my IIS started, I can’t able to start Apache. Perhaps this is due to they have the same port.

So, if you encountered this error message, check if you have Apache running at that time