I've seen a few mentions here regarding Adobe AIR, so I thought I'd share my experience. In an attempt to install TweetDeck (a Twitter app), I ended up crashing my machine. Luckily, the startup repair corrected the issue. But after poking around a bit, I've found a solution. The issue seems to be tied to the fact that the version of Adobe AIR that comes packaged with Acrobat Reader is outdated, and isn't compatible with Win7. It also wouldn't uninstall. So I did the following: Downloaded the newest version (1.5) from Adobe's website (via Firefox)Ran the installer, which removed the old version and installed the newer versionRestarted the machineDownloaded an .AIR file (in this case, TweetDeck)Installed the file from the desktop (not from the browser)Following those steps, the application runs fine and doesn't seem to crash. Hope this helps someone else.