I just installed Lightroom on my Win 7 32-bit desktop. It asked if I wanted to use my existing Elements catalog. I said yes. From that point, Lightroom would not load, or rather, it loaded and was visible using Task Manager, but displayed no panels. I tried to launch it using its desktop shortcut and also using Windows Explorer with the same result. I uninstalled Lightroom and reinstalled it. Theis time no display of any panel (no catalog panel), but still running resident when viewed with Task Manager. I had major installation problems with Elements 10 when I installed it 3 weeks ago and spent 40 minutes chatting with tech support to get it operational. What kind of crap is Adobe foisting on the public? By the way, I am a retired programmer, for what that's worth when it comes to trying to debug this expensive junk.