1. Install Java here.
2. Download the application here.
3. SAVE the application to your DESKTOP or to the DOCUMENTS folder.
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).