Instructions:

Download the screensaver you want then by left clicking. A dialog box will come up asking to run , save , or cancel. Select save. Select where you want to save the file to and select save again. Now go where you saved the file and right click on it. There will be an option to install the screensaver select it and now your new screensaver is installed. If you selected run instead of install you would be allowed to see the screensaver but it will not install.