Due to a missing or corrupt System\32 file, I had to reinstall Windows XP with my manufacturer's Recovery disk. I knew this would wipe out my access to all my files and computer programs, and it did. Starting fresh again with Windows XP, I decided to defragment the disk drives, perform an Error Check, and scan for any viruses or spyware. To my amazement, all the old files and programs I had before reinstalling Windows are somewhere still on the computer's C: Drive!!! So I did a Disk Cleanup and compressed some of the old files. However, these files and programs are still taking up 251 GB of space, over half the space of my computer's capacity of 451GB. I only have 214GB of free space left. I was not able to uninstall or remove or delete the old files and programs before I reinstalled Windows XP; my operating system was not working at all. Questions: So, my questions are: 1) Is there anyway to access the old files and programs after reinstalling Windows XP??? (My understanding is it is basically impossible to do so). 2) If I cannot access the old files and programs, how do I get rid of them and free up the 251 GB of Disk Space on my C: Drive???