A couple of months ago I had the same, but uninstalling and reinstalling didn't solve it. As it had been a few weeks I had used PSE I went to a Systemrestorepoint in the past at a moment of which I figured PSE worked and that solved the problem.
A few days ago I had used PSE and no software installed or removed up till today. And there was some software which I don't use and had removed previous time: Asus stuff which was already pre-installed on my laptop when I bought it, like Governor of Poker and Hotel Dash Suite Success (software by Oberon). After having removed this stuff PSE11 started nagging about missing files, so I had to do a systemrestore again. It's strange that it messes up the PSE-installation. I'll have to contact Oberon (or Asus) as well, as I don't want this software and it's consuming resources on my laptop. Unfortunately the simple deinstall of this stuff and then a reinstall of PSE11 doesn't solve the problem. After that I am still left by missing files. What uses PSE what's being used by the Oberon-stuff and vice-versa?
BTW: I'm using Windows 7 64bit premium.
