if you want to install notepad.exe you have one of the most effecttive option if you are using windows98 or me.
1> click start menu.
2> click run.
3> type "sfc" and press enter.
a window will appear asking you to scan all system files or to extract a particular file.
4> click "extract file".
it will ask for file path .
5> type "c:\windows\notepad.exe"
6> press start.
this will prompt you to save its previous version into a backup folder.
7> click "ok"
if he folder does not exist it will prompt you to make a new folder.
8> it will ask for file path to extract file from. enter the path of installable windowsdirectory.
in few seconds it will extract the needed file. this option can be used to extract any file.
the other way is
1> open control panel, open add/remove program
2> move to windows setup tab.
3> install all the accessories.
4> apply settings.
5> if asked for file path enter the path of installable windows directory.