I've just spent hours on trying to get SP3 to install on a Windows XP Professional machine and only now stumbled across the article stating that it won't install when "RDP 6.0 MUI Pack KB925877" has been installed previously. I've installed XP SP3 literally dozens of times over the years and this is the first time I've ever seen or heard of this problem; I only discovered it by downloading the standalone version of the Service Pack and trying to install it - all the other times it just failed without any informative error messages that I'm aware of. Why on Earth should this bizarre circumstance still exist this many years after the OS has been out? And why the Devil didn't Windows Update at least give me the same message as the standalone "executable" when it failed, rather than just dying on the vine and never telling me anything? I've just blown a good 4 or 5 hours over something that should never have happened in the first place. The KB 925877 Update simply installed just like the rest of them did, with no warning whatsoever that SP3 had to be installed first. So Microsoft, what gives (and why play "I've got a secret" with such a critical flaw)? It's simply inexcusable this many years down the road! How about a warning message or something, at the very least?