Apple Application Support is required to run iTunes.

On AppleiTunes 9 do you get the following errors?

“Apple Application Support was not found.

Apple Application Support is required to run iTunes. Please uninstall iTunes, then install iTunes again.”

To solve this do what cr4z33 said:

“I found the solution myself!

1. Download and install WinRAR.
2. Right-click the iTunesSetup.exe icon and choose “Open with WinRAR”.
3. Once the EXE is opened in WinRAR, double-click AppleApplicationSupport.msi and when the installer window is open choose “Repair”.
4. Done! You can now run iTunes normally. “