Replaced Abit Siluro GF2-MX with HIS ATI 9550 when I try to load driver, on reboot PC locks up half way into boot sequance, I then reset and have to select, Last known good configuration but no driver is installed, tried to install driver through Driver Update etc then half way into driver install crashes to black screen with flashing cursor and stays that way till I reset. When checking Device Manager it shows 9550 Secondary Display ok but 9550 Primary Display with the yellow triangle and ! mark, checked Resources for the Primary Display which shows Resources number for I/O and Memory with No Entry over them, it shows a conflict with the same Resources being used by AGP-CPU. I cannot change resources manually as all hardware resource settings are Greyed out. Help!! Col 1.2 Athlon, XP Home SP2, 3xHDD=260GB, DVD-RW, SB Live 5.1, Hauppauge PCI TV, ADSL modem, USB2 PCI, 550W Power Supply.