This is a simple Widget that stays hidden most of the time. When iTunes starts playing a new song, it pops up on the corner of the screen and announces the track name, artist, album, and shows a thumbnail of the album art.
Very nice widget .. but one thing is missing ... It takes time to get that a new song is being played .. so It shows the album art and info of song A while song B is being played .. I hope you can fix this .. I keep the widget visible all the time
The problem you are experiencing is common. It is caused by iTunes. Luckily the fix is also easy. For some reason, about 1/3 of the time, the iTunes installer application malfunctions when installing WMI tie-ins. The way to fix the problem is to simply reinstall iTunes. You don't even have to uninstall the old one. Just install on top, reboot, and everything should work OK.