You should download the zip file onto your computer from this website,
then extract the files to your hard drive.  For ease of use, it is highly
recommended to extract to the folder 

c:\agc


You may need to create this folder. This can be performed in 
Windows Explorer's Extract dialog by clicking on the C root directory,
then click the "New Folder" button and then 
type the name "agc" into the resulting dialog.

When you have created the folder and have the Extract dialog
pointed to it, make sure you enable the 
"Use Folder Names" option.

After extraction, it is strongly recommended that you print the 
Update Instructions document for easy reference throughout the
update process.