- Disconnect your iPhone/iPod touch from the computer
- In Vista Programs and Features (Control Panel), Uninstall the Apple Mobile Device Support
- Restart your computer
- Download the iTunes 7.7 installer
- Open the iTunes 7.7 installation exe with Winzip or WinRAR, and reinstall only the AppleMobileDeviceSupport.MSI
- Reboot your system
- Reconnect your iPhone/iPod touch
Thanks iPhone Atlas