Had a question from the community here on how to determine the installation date for installed hotfixes. The information is where you'd expect it, but it may not be immediately visible:

1) Launch Programs and Features
Control Panel > Programs > Programs and Features

2) On the top of the left margin, you'll see "View installed updates". Give it a click.

3) By default, this list shows: Name, Program, Publisher, and Installed On. Yep, there it is the problem is that the default size of the window probably requires that you make it larger or scroll over to the right some in order to see it.

Like most file list views such as this one, there is even more that you "could" see if you wanted. File version information and other meta data can be added as a column by right clicking on the existing columns and choosing "More...". Of course, the ones that make sense are there by default. You can however choose more here (keeping in mind that not all information will be available depending upon the file in question).