I have a Win 7 desktop with many installed programs as well as much data, but the operating system is acting in such a way that I want to reinstall it, I have the installation disk as well. My question is, how do I go about removing the old O/S & do a clean reinstall. Can I use the Win 7 Backup & Restore program or is there a better way? I know about backing up files but how about the installed programs which I would like to preserve? I appreciate any help I can get with this.