Try to boot from your Windows CD-Rom disc. If Windows comes all the way up, use a backup tool to salvage all of your data. I use StompSoft's PC BackUp
http://www.stompsoft.com/pc-backup/pc-backup.html I have had a lot of success with that. Believe me I have heard the "click of death" before (that really is the only way to describe it), and I have lost data, which is why I began routinely backing up.