1. Install Java here.
2. Download the application here.
3. SAVE the application to your DESKTOP or to the DOCUMENTS folder. (It will not work if unzipped elsewhere.)
4. Unzip the downloaded file (right-mouse click and choose "Extract All...")
5. Open the folder and double-click the calculator to run it

 
TROUBLESHOOTING

It keeps asking me for my log in and password!
The graphing calculator needs to save a file to its folder. Some versions of Windows restricts where this can be done. Make sure the folder is unzipped (step 4 above) and make sure the unzipped folder is either on your Desktop or in your Documents folder (step 3 above).