Hello can anyone tell me the difference between the win-OS-Upgrade-K9.2000-4-5a.exe (31-JUL-2007) and the win-OS-Upgrade-K9.2000-4-4a-sr10.exe (21-AUG-2007). Which one do I have to use now. We currently have 2000-4-4a SR6 and I just don't know what I have to use for the next OS update. Thank you for help Reto