Re: downloading to a disk
Copy it over to a thumb drive or pen drive (whatever you want to call it). Do you have Internet on your personal computer? If you do, why don't you just download it at home from the website you found that screensaver on? But if you don't, just download it onto the Desktop or wherever and copy that file to your Floppy, burn it on a CD, copy to Zip disk, pen drive, etc.
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?