FEISAR
Adobe products are notorious for causing other programs "this program is not responding" problems, especially internet browsers.
It's usually caused by them automatically searching for updates, well Adobe says it's for updates, but those in the know say it's checking to see if it's pirated software, and that the way they have implemented this searching can and does conflict with any and all of the following, Both McAfee [especially] & Nortons security software, IE browsers security, Firefox add-on's [need to visit Firefox site to fix]

They are an absolute pain to uninstall as well, you usually find that you have to go to the Adobe website to get specific instructions on how to get rid of the bloody things, as windows "Add/Remove Software" won't get rid of them completely, and even then you'll PC won't be the same as they would of messed your registry up, which in turn stuffs everything else up to the point where your PC get really really slow at boot up especially.
Great products for the most part when working properly, but they can freeze up a PC and make it so slow that only a complete system reinstall will get things back.