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Figure 4-2 Digital Signature Not Found dialog box
The Information dialog box appears warning users that, depending on how the driver is installed, a Windows
Hardware Quality Labs (WHQL) Digital Signature Warning will appear. Changing the configuration of the driver does
not impact the performance or quality of the driver. Changing the configuration may invalidate the driver's digital
signature and triggers the appearance of this dialog box.
3. Click OK
4. Click File and then Open
5. Open a driver configuration file (cfg) or an existing cfm file (such as HPCPU195.CFG for the HP UPD 6.4.1 PCL 6
driver)
Figure 4-3 HP Driver Configuration Utility (DCU)
6. Modify settings to your requirements.
7. Save the changes.
File-Save As: Allows you to select the file name and extension. If only a file name is entered, the application
saves the file as (filename).cfg to the defined directory. In order to save the file as a cfm, you must type the
extension .cfm after the file name.
NOTE: File-Save: Saves the file to the same filename from where it was opened, which may impact the digital
signature. To not impact the digital signature, HP recommends using File-Save As and saving the file as a .cfm
file.
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