What would happen to the old applications after I install Windows 7 on the old Win XP partition?

I have 2 partitions, C and D. C is currently for my XP, D is for my files. I also installed most of my applications (office, firefox, GAMES, etc) in D. My question is, if I delete the XP in C and use it to install win 7, will it affect the applications on D? what would happen to each application's registry? would I need to reinstall the apps/games after I upgrade to Win 7?
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More about happen applications install windows win partition
  1. You need to reinstall.
  2. Best answer
    To expound on what USAFRet said, even if you don't delete the programs from your logical drive D, you will just need to reinstall them under Windows 7, after you finish your Windows 7 installation.
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