You can try going into windows services and stop the filemaker server service...
a few questions:
- What hardware and even more important which OS and version?
- You are really sure that no previous version of FileMaker was ever installed on this computer .... ? ... because if a previous version was installed, it will have to be de-installed before proceeding.
The problem you encounter here has been mentioned by one other person within this forum. I have not experienced it myself and I believe that it is very very rare.
If you could answer the questions here it will be easier to proceed. But if the server is really a clean install you might have to prepare for a reinstallation of the OS.
A comment to Jwalstab: Since Keason is explaining that this is a new machine and that no previous version of FileMaker has been installed, he/she will probably not be able to stop the FileMaker Server Service.