Over the years, I have reformated my HD under Win9X & reinstalled the OS, programs & restored my files from backup. This is the first time I am going thru this procedure under WinXP. What are the specific steps I need to follow to reformat my HD? How do I re-activate WinXP? My file system is NTFS. I have a 2nd 20MB NTFS HD which I will leave intact.