Never let the the installer automatically install to the default location of C:Program Files,with some programs it is best to install into a different folder/location.
I have FDC installed to C:
I was asked to create a new folder which i did....I called it FDC
The installer was pointed to that location and installed it!!
So...what you need to do is...click start/computer/click on C (local disk) or whatever you have called it....
You will see alot of folders:Program Files,Program Files (x86) and so on...
In that list click, on New folder (at the very top) and call it FDC or whatever you prefer....
Now when you install the disk,after you have entered all the registration details and you click to continue,you will need to manually browse for the folder you have created in C drive,as mentioned above,once found then let the installer run...and as with most programs,turn off AV and Firewall and you don't need to be connected to the net either...
Hope this helps you sort out the problem...