Tried the following:
1. Quit the following programs, if they are running:
§ iTunes
§ QuickTime Player
§ Apple Software Update
2. From the Start menu, choose Control Panel.
3. In Control Panel, open "Add or Remove Programs."
4. Select iTunes from the list of currently installed programs, then click Remove.
5. When asked if you would like to remove iTunes, select Yes.
6. After the uninstallation is complete, do not restart your computer if you are prompted to.
7. If other program entries were listed for iTunes in Add or Remove Programs, remove those as well by repeating steps 4-6.
8. Remove any iPod Updater applications that are listed the same way you removed iTunes.
9. Remove all instances of QuickTime the same way you removed iTunes.
10. Remove all instances of Apple Software Update the same way you removed iTunes.
11. Remove all instances of Apple Mobile Device Support the same way you removed iTunes.
12. Remove all instances of Bonjour the same way you removed iTunes.
13. Remove all instances of Apple Application Support the same way you removed iTunes.
14. Restart your computer.
Still no joy..!! can't run iTunes...