I find it folly to install my applications on the C drive, especially the larger applications. Doing so makes the C drive so large that it is cumbersome to make the image backups that I think are necessary to insure an easy recovery from any problem causing a failure to boot. In WinXP, there is...
app management
backup
custom install
defaultinstallation
drive management
file location
hotkeys
installation issues
installation path
intervention
program files
registry
scripting
software installation
tech support
windows 7
windows settings
windows xp