I was gifted windows vista ultimate by my brother.the installation had several problems coexisting with xp so i did a clean install by booting from dvd.the installer crashed several times but the installation was never interrupted or stopped.it even crashed during performance analysis but then after reboot i was asked to enter user name and password.it then crashed again and again asked me to enter a different user name and password.my pc easily exceeds the minimum requirement for vista ultimate.the aero theme looks great.but os crashes several times during normal run.i did a debug analysis and found that the problem was caused by ntoskrnl.exe but how do i get this useless os to run fine.also as stated in digit vista should unload everything useless but instead it uses a lot of video memory through the aero interface i have 256 mb of video memory and tried to run r6vegas but even after disabling aero and running in program compatiblity the game crashes due to lack of memory.this os needs a hell a lot of memory.i am going to use readyboost usb memory to increase performance