Hi there, It's my first post here, I'm sorry I'm just comming just to ask for help, I hope I can support in other threads, altought I'm a begginner :nerd: Ok, I have a new pc (2 month) Asus p5kc motherboard, Intel Core 2 Duo, nvidia 8800gtx, x2 2GB ddr2, 500gb hd, which used to work fine until new year arrived (what a start). Everytime I play a video or try to play some games on Windows Xp pro, I get a blue screen "irql_not_less_or_equal" with some long message stop: 0000000a.... If I try to play these videos on my Vista partition everything works fine, I also can play games there. I've tried to remove video card drivers on XP, and then playing the videos again, and it doesn't crash!!! I've tried both download the latest nvidia drivers and with my original cd, but after installing them I tried to play the video and the same blue screen is there... :bang: I've tried to find this problem around google but I just can't find any answer!. Someone suggested to try with memtest, I did let it working all night but it didn't found any error. Does anyone know why can this happen? Thanks in advance and sorry for my english!