When un-installing applications in an environment where you have my documents re-directed to a mapped network drive for example "H:\My Documents" you may get an error and the un-installer will quit. (I think may be an installshield error)

Sometimes you don't really want to re-map the network drive, but you want to get around the error message and complete the un-installation.

The Fix:
subst <TheDriveIt'sComplainingAbout> C:\
e.g.
subst H: C:\

This will create a drive and allow the un-installation to complete.

Windows XP Pro SP2