I have been trying to trouble shoot a problem for some time now. Windows Media Player 10 does very odd things to me as far as system resources go. System Specs: Windows MCE 2005 AMD Athlon X2 3800+ Asus A8N SLI Corsair XMS 2gb 6600GT gfx Windows operates fairly smooth, the problem I can see has to do with AV related stuff. WMP will work great for about 5 minutes, then CPU usage goes to 50 and stays at 50 (im guessing its maxing out one of my cores?) the memory just starts racking up, from 18 M it just keeps going up ... next you know 38, then 48 , then up to 90, and it goes up about 150 MB of mem usage and again 50 percent on CPU, this ofcourse makes everything sloooow and I cant even change the volume after about 15 minutes. Until I go to end the process of wmplayer.exe. When I use winamp i see normal results for resource usage. Why does windows media player HOSE my system? Also WMP will not close correctly usually, if I have been playing music for 10 minutes before crap hits the fan and basically locks up my system I click the X and music keeps right on playing until I manually end it in Task Manager. I have reinstalled windows a few diff times. I RMA'd my RAM back to newegg SAME damn problem. I dont have spare parts to swap in and out because of the new cpu socket 939 for my X2. I am guessing its motherboard related now. Thanks.