I've never really used WMP before but I'm quite enjoying Media Center on the Windows 7 beta. I'm not really getting to grips with WMP library though. Basically how long does the library take to pick up new or modified files in monitored folders? I've selected my music drive as a folder to monitor and sure enough it churned slowly through all 140GB on starting the player. After the first scan I changed the tags on some files. How long should it take WMP to pick up on these changes. Nothing seemed to happen for an hour, so I dragged the files I'd changed into WMP where the library seemed to delete the old files and add the new ones as "unknown" at the bottom of the library. It might have done this as just part of it's (very slow) process, but I'm an impatient man.