quicktime.msi error installing 7.2.0.240
Installing iTunes + Quicktime or standalone realtime prodcues the error - "the feature you are trying t us is on a network resources that is unavailable" and has a box called "Use source..." for defining where this file exists. The .msi file lives in the path specified by default. Clickig OK produces the message "The file 'C:\Program File\Apple Software Update\Packages\Quicktime.msi' is not a valid installation package for the product Quicktime. Try to find the insatllation package 'Quicktime.msi' in a folder from which you can install Quicktime"
There is no change if I browse to the direct from the dialog and select the file.
I have tried uninstalling the current version of Quick Time from "Control Panel > Add/Remove Programs" but this produces the same error. Selecting change in this dialogue also produces the same error.
Selecting "Uninstall Quicktime" from Start > Programes > Qicktime produces the error - uninstall only valid for insatlled products.
To summarise I can neither install or uninstall Quicktime and this is additionally screwing up iTunes.
The current installationof Quicktime is 7.1.5.120
HELP!
Hybrid, Windows XP Pro