Excuse the shortness of this reply and multiple questions, but this is asked often. The mistake users make is usually an error in partitioning the hard drive for Fedora.
What method did you use to partition the hard drive, ahead of time usng some sort of utility, or by way of the Fedora partitioning utility during the installation?
If a third party utility, where did you make space for Fedora, at the begining of the drive or the end?
If you partitioned using the Fedora installer, what method of partitioning did you chose from the menu when you got to the point of telling Fedora how to partition the drive?
Where did you tell Fedora to place the Grub files and bootloader?
...and just to clarify, this is the only hard drive in the system?
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"I love it when a plan comes together." - Hannibal Smith