"package dependencies cannot be resolved" in Ubuntu

I'm trying out Ubuntu with a dual boot using wubi, before committing to it 100%. I have no prior experience with Linux. Just installed it today, 12.04.

I went to the ubuntu software center and found musescore, but I can't install it at all :( Help anyone? Here is the detailed error text:

The following packages have unmet dependencies:

musescore: Depends: libc6 (>= 2.14) but 2.15-0ubuntu10.3 is to be installed
Depends: libgcc1 (>= 1:4.1.1) but 1:4.6.3-1ubuntu5 is to be installed
Depends: libportaudio2 (>= 19+svn20101113) but 19+svn20111121-1 is to be installed
Depends: libqt4-network (>= 4:4.8.0) but 4:4.8.1-0ubuntu4.3 is to be installed
Depends: libqt4-script (>= 4:4.5.3) but 4:4.8.1-0ubuntu4.3 is to be installed
Depends: libqt4-scripttools (>= 4:4.5.3) but 4:4.8.1-0ubuntu4 is to be installed
Depends: libqt4-svg (>= 4:4.5.3) but 4:4.8.1-0ubuntu4.3 is to be installed
Depends: libqt4-xml (>= 4:4.5.3) but 4:4.8.1-0ubuntu4.3 is to be installed
Depends: libqtcore4 (>= 4:4.7.0~beta1) but 4:4.8.1-0ubuntu4.3 is to be installed
Depends: libqtgui4 (>= 4:4.6.1) but 4:4.8.1-0ubuntu4.3 is to be installed
Depends: libqtwebkit4 (>= 2.2~2011week36) but 2.2.1-1ubuntu4 is to be installed
Depends: libstdc++6 (>= 4.6) but 4.6.3-1ubuntu5 is to be installed
Depends: zlib1g (>= 1:1.1.4) but 1:1.2.3.4.dfsg-3ubuntu4 is to be installed

TIA for any feedback.