I got this error before and reinstaling helps. To make sure this doesn't happen again. Put the G-Force file into the new and clean CF folder, BUT DO NOT RUN IT YET.
Then:
1. Right click on G-Force.
2. Click Properties.
3. Click the "Compatibility Tab"
4. Check the box that says "Run this program as an administrator"
5. Click OK.
It should now work and will not have anymore problems. Just make sure you completely delete Crossfire and you re-install it first.