Hello,
Welcome to the Microsoft Windows Community.
Good evening. Printers do not require an activation serial number; simply connect the cables and install the driver,
Select and download the universal driver.:
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I had removed this printer and want to reinstall it. And it says I need a CD-Key. The printer is 4 years old and I have not been able to find the key in my information from when I purchased it.
Hello,
Welcome to the Microsoft Windows Community.
Good evening. Printers do not require an activation serial number; simply connect the cables and install the driver,
Select and download the universal driver.:
AI answer
You do not need a CD key to reinstall an HP ENVY Photo 7855; download its Windows 10 software directly from HP’s official support page.
HP also provides a dedicated setup page for this model, including its supported setup choices.^2^
Do not purchase or enter a “CD key.” If a website or installer demands one, close it and use the official HP page above.
In Windows 10:
For a USB connection, plug the printer directly into the computer and turn it on before using Add a printer or scanner. Windows should attempt to detect and install it.^3^
If neither HP’s installer nor normal printer detection works:
Microsoft identifies this legacy wizard as a last-resort method that may help with older printers.^4^
References