You still don't give much info!!!
So here you figure it out!!
http://search.microsoft.com/results.....Invalid+Drive

"Petterq" wrote:

> Yes, the drive is removed. It was an extra harddisk from wich I transferd
> some data.
>
> When trying to install new programs, or removing a program, I get this error
> message, and the installation fails.
>
> Petterq
>
>
> "Dixonian69" wrote:
>
> > "This drive in no removed"????
> >
> > explain more what you're "trying" to do!!!
> >
> > "Petterq" wrote:
> >
> > > I get this error message when trying to install a new program (Canon EOS
> > > Solution disk). I also got the same message when trying to uninstall Norton
> > > Antivirus.
> > >
> > > I connected a drive G: to copy some files from an old disk. This drive in no
> > > removed, but it is obviously causing some problems.
> > >
> > > Do anyone know how to fix this?