Windows OS Error Code 5 means "Access denied" and points to a problem with priviliges of the
User account under which you are trying to install or run the Service. The easiest solution would be to install the Service as
Administrator (right-click the EXE and use "Run as Administrator") and run the Service under the
Localsystem account (default when installing Services compiled in Delphi).
If there is a reason for you to NOT want to run the Service under the Localsystem account, then you will need to configure all the required permissions manually for the User Account you want to use for running the Service. The absolute minimum you need for RTC components is Network Access. If you are unfamiliar with configuring User permissions under Windows, I am sure you will find a lot of useful guides on the web. Here is one I've just found which looks like it was written for absolute beginners, while at the same time convering a lot of material:
http://www.howtogeek.com/school/windows-network-sharing/Best Regards,
Danijel Tkalcec