QuadSolver by Peter Samsonov v.1.1
Step 1: Using the equation ax^2+bx+c, input the variables a, b and c as the first, second and third lines of QuadInput.txt.
Step 2: Run the QuadSolver.java file by opening up the DOS prompt, going into the folder the program is in and typing in "java QuadSOlver".
Step 3: View QuadOutput.txt for the discriminant, nature of roots and the roots themselves.

FAQ:
Q: DOS prompt says "java is not a valid command or batch file".
A: You don't have Java installed. Download Java at sun.com.

Q: DOS prompt says "ClassDef not found".
A: You are in the wrong directory. Change directories in DOS by typing in "cd [location]". For example, "cd c:\QuadSolver"
gets me to where my QuadSolver is. WARNING: DOS can't "cd" to a drive it's not installed on. Quad Solver will only run from command line if it's on drive C (most likely).

Q: I get a NumberFormatError.
A: One of the first three lines of QuadInput.txt contains one or more letters. Only numbers and a decimal spot (".") are allowed.

Q: I get an IOException.
A: This can mean one of two things. The first one, the most likely one, means you either don't have QuadInput.txt, or one of the first 3 lines is empty. The other, more unlikely, problem is that you can't write on the disk, hence can't have the answers save. Either free up some space or move the program to a disk you can write to.

Q: I don't get this whole "Quadratic equation" thing.
A: I'm not your math teacher. Ask him or her. If you don't know, odds are this program will be of no use to you.

Q: I need help installing Java!
A: Download the executable from Sun's website (I recommend using the Offline installation, the Online breaks sometimes) and run it. I don't work for/with Sun Microsystems, so I can't help you further.

Q: Do you have any more programs?
A: Yes, at my website http://www.geocities.com/captainblueshirt

Disclaimer: I am not responsible for any damage this or any other of my programs cause, mainly because they are incapable of doing any harm.