Can't download any new programs on XP

I have searched and when it comes back with 18000 possible, it's mind boggling. I have windows XP pro, had a virus problem, got rid of it, but I think I lost a file or something. When I try and download or open some programs I get the pop-up box "what program would you like to use?" for example, I cannot open Firefox browser, I can't download IE 8, I can't open my Olympus Picture manager. I'm sure I am missing some sort of file. Any help would be appreciated.
3 answers Last reply
More about download programs
  1. sfc /scannow
  2. I don't understand what you mean??? Do I type it in somewhere? I still need help.
  3. In the Run box in the Start Menu, type in

    sfc /scannow (with the space)

    Then hit OK

    The system will restore damaged files, and might ask you for your CD.
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