Cheer up buddy, all is not lost.
The solution is simple. Your bios, that little program that starts your computer has "lost" your 80mb disk. Open My Computer and look for an "E" drive. If you find no "E" drive right click "C" dive and look at "properties"; note the size then do the same for "D" drive. Together they should = ~ 60 gig telling you that, yes, "E" drive is lost. (If it equals 80 your other drive is "lost") Turn off your computer, get a cup of coffee, get comfortable. *Importante* If you have a cat or kid; kick 'em out and lock the door. Turn you computer on, watch fast and look for something to pop up right away such as "press f2 for setup" or "f2=setup". Press f2 and you will go into setup. Use your brain, you're in DOS mode and a mouse won't work. Look at bottom of screen for directions on how to navigate in the setup mode. If you screwup at this point you will usally be able to hit the escape key at which point you can choose to save or reject changes. If you screw up discard changes, reboot and start over.
Okay you're in setup mode. Navigate to hardisk drive installations, usually labeled primary drive 0 and primary drive 1. One of them should say "not installed". This is the setting you want. Change that setting to "auto-detect". Save changes and reboot to Windows. Check for "E" drive again. If it still refuses to appear it's because the operating system on the "E" drive, since it was your original "C" drive is still active and the newer installation is knocking the older installation out of the loop. They say it isn't supposed to happen, but believe me, it does. Try it out and write back. If the operating system is still kicking you off of your "E" drive I'l walk you through the steps of recovery using the Windows startup disk.