he "WDF Coinstaller installation", which is part of the SetPoint 4.0 drivers, is the cause. I was able to install this update only after unplugging my G7 Mouse. But upon re-plugging of the Mouse receiver on to the USB Port, the "WDF Coinstaller installation" launches again, and 1) hangs. INF install will not continue and the XP hardware update wizard takes forever; 2) sends a error code to the driver installer itself and than the hardware update wizard fails with a fatal error;
THE SOLUTION (this took three days for me to find it out): go to \programs\common files\logitech\CDDRV (if you can't find this folder, simply seach for "LfMouHid.inf". Open the file for EDIT. Delete this lines:
;--- WDF Coinstaller installation ------ ; [DestinationDirs] LOGIHIDMOUSE_Inst_CoInstaller_CopyFiles = 11 [LOGIHIDMOUSE.NT.CoInstallers] AddReg=LOGIHIDMOUSE_Inst_CoInstaller_AddReg CopyFiles=LOGIHIDMOUSE_Inst_CoInstaller_CopyFiles [LOGIHIDMOUSE_Inst_CoInstaller_AddReg] HKR,,CoInstallers32,0x00010000, "WdfCoInstaller01005.dll,WdfCoInstaller" [LOGIHIDMOUSE_Inst_CoInstaller_CopyFiles] WdfCoInstaller01005.dll [SourceDisksFiles] WdfCoInstaller01005.dll=1 ; make sure the number matches with SourceDisksNames [LOGIHIDMOUSE.NT.Wdf] KmdfService = LMouFilt, LOGIHIDMOUSE_wdfsect [LOGIHIDMOUSE_wdfsect] KmdfLibraryVersion = 1.5 ;-------end of WDF section
Save the .inf file. Launch the driver update wizard again, select "manual" and point to the CDDRV folder. Select the new edited "LfMouHid.inf" file and THE 4.00 DRIVER WILL BE INSTALLED WITHOUT PROBLEMS!! The only thing is, since we have edited the inf-file, the driver is not signed anymore, but who cares?