hi everybody...i am new registry by today.. i hv a question wan asking... My OS is Windows XP SP3,Display Card is Saphhire HD4850 ,VGA drive is 9.2v and ATT is 1.6.9.1382. when i install the KM directX 10 Fix3 ,and then my Far cry2 cant run,so i use the UdirectX to roll back the DirectX to 8.1 after that i install again the 9.0c and restart.....the problem is coming....i see the ATT is start but a while it is automatic exit. i hv try goto safe mode uninstall the drive and ATT ,install again but is got same problem! how can solve this problem? i dun wan reinstall the OS. Thanx a lot and sorry for my poor english.