Superdude: I didn't really find any of the standard fonts on Dafont. However, there are commercial links, and I, for exampel, saw the possibility of buying Arial for 467$.
I have never used that font site but . . .Do not pay that kind of cash for a font . . those days ended with ttf. Do you need Arial ?? That is a standard font for a windows install, if missing that may be the font it is looking for.
The OP has most likely installed with a different language, which prompted my first response, I have no idea what your system is running (language ?) so my reply may not address your problem.
I don't know which font the game is looking for so it is hard to advise. Renaming would not work as the font files have naming conventions internally as well. Searching the developers website for similar problems would be my first action followed by sending a help ticket directly to the developers help desk concerning this problem.
I would find a friend with a computer running the same OS and compare the contents of the font folder. If your folders match (standard fonts) and you have no corrupted fonts than it could be the game failed to install an embedded font. Re-installing may be a fix . . . if that is the problem.
Vista / Win 7/ firewalls can block install programs. You might uninstall the game, disconnect from the internet, disable your firewall / AV, right click the install file, click Run As Administrator, after installing enable your firewall / AV / reconnect and see if the game runs.
Edit: I would suggest you do not install any font "packs". If the error message is correct, you need only one font . . . maybe two.