Hi,i´ve got some issues with random apps crashes. I installed vista x64 yesterday because i bought a new MoBo (Asus P5K), and im using the same components that i have with previous MoBo (Asus P5B) that worked perfectly. Now some apps crashes without any reason (Messenger, Firefox etc..) and i got a BSOD and sometimes Aero disables by itself . I think that is a problem with the P5K but im not sure at all, i also passed Memtest86 My system Specs are: Proc:Intel Core 2 Duo 6750 @ 2.6 Ghz Mobo:Asus P5K RAM: 4 x 1 GB Kingston DDR2 800 GPU:XFX Nvidia GeForce 8800 GTS 320 MB HDD: 3x 300 GB SATA Seagate DVD: LG H44N Other HW: Xbox 360 USB Controller I´ll attach dxdiag and the minidump files. Thanks for your time and sorry for my english.