HP UPD - System Administrator's Guide HP UPD 5.6.5

2. Right-click the first listed HP PNP Scan Null driver, and then select Uninstall. In the Confirm Device
Uninstall window, select Delete the driver software for this device.
Windows will now automatically try to reinstall the printer.
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If two HP PNP Scan Null drivers were displayed under Imaging Devices, no further action is required.
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If there are two old HP PNP Scan Null drivers installed, you will have to repeat the action in Device
Manager.
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If only one HP PNP Scan Null driver was installed, you will have to reinstall HP UPD 5.5. Use pnputil-
*.inf (drivers which are already installed will not get changed).
Now disconnect and reconnect the USB cable to restart the Plug and Play installation process.
176 Appendix B Known issues ENWW