Ok, let me run down what we're doing here. I've built a Universal Desktop image for my agency from the ground up. We have it just the way we want it. We store all of our drivers in C:\Drivers (i.e. C:\Drivers\hp\dc7800\nic) and we are deploying to roughly five or six different desktop models. I use Vernalex's SysPrep Driver Scanner to scan the C:\Drivers directory, and place the relevant values in the OemPnpDriverPath in the registry; therefore, the sysprep.inf file does not need a long list of where the drivers are located. Also, I'm using the MySysPrep hack to enable ACPI Multiprocessor. I've successfully deployed the sysprepped image to all models (and subsequently, all drivers are installed successfully - no yellow question marks in the device manager) except the HP DC7800: for whatever reason, Sysprep will not install the Nvidia video driver, the sound driver, or the Infineon driver on this model. If I manually browse and install the drivers, they work fine - albeit the prompt that indicates the driver is unsigned. After browsing the Setupapi.log file, which maps out sysprep's processes, in C:\Windows of the HP DC7800 that does NOT work properly, I've found the following (and this particular section refers to the Nvidia video driver): #-011 Installing section [nv_G86_0] from "c:\drivers\hp\7800\nvidia quadro nvs 290\oem50.inf". #E358 An unsigned or incorrectly signed file "c:\drivers\hp\7800\nvidia quadro nvs 290\oem50.inf" for driver "NVIDIA Quadro NVS 290" blocked (server install). Error 0xe000022f: The third-party INF does not contain digital signature information. #E122 Device install failed. Error 0xe000022f: The third-party INF does not contain digital signature information. #E157 Default installer failed. Error 0xe000022f: The third-party INF does not contain digital signature information. [2011/05/03 08:07:40 488.73 Driver Install] After browsing the Setupapi.log file of a DC7800 that was set up using our standalone DC7800 image (non-universal) that seems to install the same driver properly, I see this: #I022 Found "PCI\VEN_10DE&DEV_042F&SUBSYS_049210DE" in C:\WINDOWS\inf\oem50.inf; Device: "NVIDIA Quadro NVS 290"; Driver: "NVIDIA Quadro NVS 290"; Provider: "NVIDIA"; Mfg: "NVIDIA"; Section name: "nv_G86_0". #I023 Actual install section: [nv_G86_0]. Rank: 0x00000001. Effective driver date: 08/27/2007. #-166 Device install function: DIF_SELECTBESTCOMPATDRV. #I063 Selected driver installs from section [nv_G86_0] in "c:\windows\inf\oem50.inf". Clearly, the one that's working properly is pulling the oem50.inf driver file from the C:\Windows\inf directory, as opposed to the Universal setup where I have it set to pull from my driver stash at C:\Drivers - but the problem is, I don't see any of the oem inf files in that directory on the universal test box. Why would Sysprep trust the file when it's coming from that directory, but not my driver stash? (Update: further testing says that location is irrelevant) I've verified that the DriverSigningPolicy=ignore line is in the sysprep.inf file; I've verified that the driver signing options on the local PC are set to ignore (which probably doesn't matter anyways); I've gone into gpedit.msc and verified that "Devices: Unsigned Driver Installation" is set to "Silently Succeed;" I've tried extracting the drivers using Driver Magician from the working standalone DC7800 image - they are identical to the one's I'm feeding it in the driver stash; I've tried downloading replacement drivers from the HP website - no cigar; I have not yet tried, but also read that it should not be needed - the sysprep.exe -pnp command line switch (plug and play). My sysprep.inf file looks like so: ;SetupMgrTag [unattended] OemSkipEula=Yes DriverSigningPolicy=Ignore TargetPath=\WINDOWS InstallFilesPath=C:\sysprep\i386 [GuiUnattended] EncryptedAdminPassword=NO OEMSkipRegional=1 OEMDuplicatorstring="XXXXXX XP Universal Desktop 4_26_11" TimeZone=35 OemSkipWelcome=1 AdminPassword="************" AutoLogon=Yes AutoLogonCount=1 [userData] ProductKey=************************************ FullName="*******************************" OrgName="******************************" [Display] BitsPerPel=32 Xresolution=1280 YResolution=1024 Vrefresh=60 [TapiLocation] CountryCode=1 Dialing=Tone [RegionalSettings] LanguageGroup=1 [identification] JoinDomain=****** [Networking] InstallDefaultComponents=Yes [branding] BrandIEUsingUnattended=Yes [Proxy] Proxy_Enable=0 Use_Same_Proxy=0 [GuiRunOnce] Command0="C:\Progra~1\_SetSpeed\SetSpeedDuplex.exe /log=false /SPEED=100FULL /REBOOT=FALSE" Command0="C:\Drivers\Dell\WOL PXE Fix\dellfix.exe" Command1="%systemroot%\system32\postsysprep.exe /s" [sysprep] BuildMassStorageSection=yes [sysprepMassStorage] Thanks in advance for any assistance!