That is odd because now days it take forever to fill a drive.
-you could go to add remove programs and delete some of the stuff that come with a computer.... but that won't give you much room
-if you have games that you don't play delete them because if you have the disk you can reinstall later
-another thing would be programs. Delete them and custom real install. I have Ofice and realized there was a bunch of stuff I don't use. Same with my Anti virus.... I don't need password vault as I am not storing passwords on my computer
-transfer what you have downloaded before to disk
-my cable company gives me something like 6 Gigs of free online storage. I don't use it but it might be something for you to consider
-if you have that much an external hard drive would be good and easier than putting things on disk
-buy more memory of course
I won't get into all of the really complicated things that you can do.