Halacpi.dll – Pre Service Pack 4 Revision History for Windows Server XP SP3

02-Apr-2008 – 5.1.2600.5574 – Halacpi.dll – x86 – http://support.microsoft.com/kb/954434 – A multiprocessor computer that is running a Windows XP, Windows Server 2003, or Windows Vista stops responding on a black screen after you resume the computer from hibernation