Put evox or some other dashboard in the devkit folder on your e drive.
You can then access your games that way.
The XDK machines were never designed to access the f drive, so what do you expect?!?
Depending what bios your using, its probably not a good idea to run your games in a debug bios anyway. I suggest you dual-boot your system to allow normal xbox usage and XDK usage..... or just buy a devkit.