iTunes error -42110
I just opened iTunes as usual, but this time i got an error showing up. It says "An unknown error (-42110) occurred". I uninstalled iTunes and reintalled twice, but it did not work. I remember that I removed Apple Bonjour by accidently cause I thought it was unnecessary software. Seems like I shouldn't do that! I can still use iTunes without any problems, but it's such irritating. Please help.
iTunes-OTHER, Windows 7, iTunes 11.0.2