Ok well im on a flawless fully functional, fully updated Vista ultimate 32bit. I try to run halo, i've tryed installing it like 4 times, ive tryed manual updating it, yet i always get the same problem. First messege when i run halo 2, "Halo2.exe - Application error, The application failed to initialize properly (0xc000007b). Click Ok to terminate the application." So i press ok, then i get a Halo 2 for windows vista has stopped working, and the check online for solution prompt. in the expanded details i get this: Problem signature: Problem Event Name: APPCRASH Application Name: halo2.exe Application Version: 1.0.0.11081 Application Timestamp: 46368037 Fault Module Name: ntdll.dll Fault Module Version: 6.0.6001.18000 Fault Module Timestamp: 4791a7a6 Exception Code: c000007b Exception Offset: 00009cac OS Version: 6.0.6001.2.1.0.256.1 Locale ID: 2057 Additional Information 1: 9d13 Additional Information 2: 1abee00edb3fc1158f9ad6f44f0f6be8 Additional Information 3: 9d13 Additional Information 4: 1abee00edb3fc1158f9ad6f44f0f6be8 Read our privacy statement: http://go.microsoft.com/fwlink/?linkid=50163&clcid=0x0409 Seems ntdll.dll is the problem, though ive googled, tryed many things, and ntdll.dll though it has replaceable downloads, is UNREPLACABLE. Literally, almost all of windows components use this dll, so you cant unload replace or anything with it, ive removed the protection so i can replace it but its under use, if i try with inuse.exe which is designed to replace files on the fly it says there is vmf protection, there is nothing wrong with my pc, and i hear from a programmer friend with mine this is a problem with SP1 though i can't believe that as this is the only game or program that has problems AT ALL. If ntdll.dll is problematic then i wouldnt be able to run vista at all. Thanks microsoft for developing a pc game designed for vista that DOESNT WORK! Any help will be appreciated thank you :).