Hello ianb2711,
Welcome to the HP Forums!
I understand the installation of the LaserJet is failing. I order to assist you properly, please try all of the following steps:
1. Press the Power button or switch to turn off the product, if it is not off already.
2. Disconnect the USB cable from both the product and the computer, if you already connected it.
3. Press the Power button or switch to turn on the product.
4. Reconnect the USB cable to the product and to the computer.
The HP Smart Install program should start automatically. Follow the on-screen instructions to install the software.
If the HP Smart Install program does not start automatically, AutoPlay might be disabled on the computer. Follow these steps to start the installation:
Click the Windows icon, click My Computer, double-click the HP Smart Install CD icon, and then double-click the SISetup.EXE file.
5. If the program prompts you to select a connection type, select the USB cable option.
6. Follow the on-screen instructions to finish installing the software.
Please let me know how this troubleshooting goes. Thanks!
Mario