Canon's raw conversion software, Digital Photo Professional, is so useless I don't even bother to try to install it any more. Complaining got no response whatsoever.
Adobe Lightroom beta won't even install on Windows 2000, only XP. Why?
And now I just upgraded from DxO Optics Pro v3.5 to v4 and it won't run unless you're logged in as a member of the "Administrators" group, even after resetting file and registry permissions that shouldn't have been restricted to "Administrators" in the first place.
Hopefully Adobe will learn from the author of Raw Shooter Premium, a great little program with a clean, simple installation, small memory requirement, fast thumbnail generation, logical workflow, and great results. RSP is the only all-around "good" piece of software I've found since going digital, and now it's dead.