Im working on a Compaq Presario SR5433WM and it fails when installing windows 7, wont reinstall windows vista and blue screens when trying to install win XP, ive removed the modem, tried different, ram simms, removed the hard drive attached it to another pc and reformatted it, removed the CMOS battery and reset the bios to the default settings and also tried to install Win 7 from a bootable USB drive and with it i got a error message stating that it cant locate the ISO image.im gonna redo the USB drive and try again but im running out of things to try.