I know that XP has a zip program already installed. I have used WinZip free for longer than I want to admit to but would rather delete that program & use the one that came with computer. If I go to add/remove programs & delete WinZip, will all zip files I have on computer now still be accessible? If I download a new zip file, will I be prompted by the XP zip prog. like I was with WinZip?