did you delete the old data on hard drive when you tried the clean install, you need atleast 20 gb to install and rest will be listed as free space. reinstall disk press any key, after the first two wndows your hard drive comes up, click on each one and the red x will be high lighted, click on the x to delete all data on each one listed then click next, during install windows will take a certain amount for system reserve. and rest is boot and free space.