I am very sorry to say that HFSlip 1.6.4 still produces an unusable AU.INF when integrating everything needed to download from Microsoft websites (except Office). My source is a german XP Pro Corp. SP2 with integrated hotfixes until 2006/08/17. I used this version to re-install my PC a couple of times and AU never stumbled. After integration I have the same symptoms as described by lek. The following files were integrated, following Tomcat76's dynamic update list for XP SP2. LegitCheckControl.cab Timestamp: "11 Oct. 2007 23:21:49" WindowsXP-KB898461-x86-DEU.exe (Package Installer 6.1.22.4) Build Date: 2005/05/17 Product Version: 6.1.0022.4 WindowsUpdateAgent30-x86.exe Product Version: 6.1.0022.4 MUWEB_SITE.CAB Microsoft Update engine Timestamp: "31 Jul 2007 09:06:18" MUAuth.cab Timestamp: "7 May 2007 19:50:27" Oh, one question: would it be better to open a new thread, sinde this one refers to HFSlip 1.4.2? AU.INF ; Windows Update INF ; Installation of AutoUpdate Service ; Copyright Microsoft ® 2003 [Version] Signature="$Windows NT$" ClassGUID={00000000-0000-0000-0000-000000000000} LayoutFile=layout.inf [DestinationDirs] AUCopyFilesSys = 11 AUDelSysFiles = 11 ; system directory AUDelRootFiles = 25 ; windows directory AUDelInfFiles = 17 CUNDelSysFiles = 11 ; LDID_SYS CUNDelInfFiles = 17 ; LDID_INF CUNDelTaskFile = 10, Tasks ;LDID_WIN [DefaultInstall] DelFiles = AUDelSysFiles, AUDelRootFiles, AUDelInfFiles, CUNDelSysFiles, CUNDelInfFiles, CUNDelTaskFile DelReg = DelAUKeys, DelCUNKeys, DelW2kAUKeys, DelOtherKeys AddReg = AddRegControlPanelCategory, AddRegKillBit CopyFiles = AUCopyFilesSys RegisterDLLs = AU_dlls [AUCopyFilesSys] [AU_dlls] [AUDelSysFiles] [AUDelRootFiles] [AUDelInfFiles] [CUNDelSysFiles] [CUNDelInfFiles] [CUNDelTaskFile] [DelAUKeys] ;wuv3is ;wuauboot ;wuauclt ;wuaucpl ;auhook ;wuaures ;wuaupd [DelCUNKeys] [DelW2kAUKeys] [DelOtherKeys] ; Service Startup Key ; old IUpdate ; wuv3is.dll ; wupdinfo.dll ;iuctl.dll [AddRegKillBit] ;AddRegKillBit WUV3IS [AddRegControlPanelCategory] [Strings] ;Non-Localizable ;Localizable ;needs to be localized exactly as the task scheduler job created by CUN WUCUN_TS_JOBFILE = "Hinweis über kritische Windows-Updates.job" I'll happily provide any futher info needed! :-)