1. Download and install WinRAR. \: [( C! `1 E: D" \8 ~+ Y2. Right-click the iTunesSetup.exe icon and choose "Open with WinRAR". . t- b* z+ S* l3 Z) m! K3. Once the EXE is opened in WinRAR, double-click AppleApplicationSupport.msi and when the installer window is open choose "Repair". " {9 d* e0 \: F4 Q t: N6 P1 q4. Done! You can now run iTunes normally