From:
label {
display: block;
float: left;
width: 150px;
}
If you were looking for HTML5 and CSS3 support, web standards update is a great choice.
However this install tool does not work if you installation is not in the defualt Visual Studio directory:
C:\Program Files\Microsoft Visual Studio 10.0\Common7
One way to fix it is to run the Web Standard update and after the update look for the default dir:
C:\Program Files\Microsoft Visual Studio 10.0\Common7
and copy and merge its contents in your current instalation directory