Error with installing updates

I was trying to install updates for iTunes, Java, and the Airport Utility updade. So far, I have done it 5 times.

My results:

1.Unexpected error

2.Sucessful

3.Sucessful

4.Unexpected error

5.Sucessful

The reason I keep on installing it is because even if it installs sucessfully, It doesn't work.

What I mean by this is when I installed it the first time, it corrupted Itunes, Java, and the airport utility

In iTunes, it gives me this error:

This copy of iTunes is corrupted or is not installed correctly. Please reinstall iTunes.

Update: The last one I installed got it working but this really ticks me off that I have try it 5 times