cannot change the default photo paper size

[jhwkr]

I used to be able to print 4 x 6 photos with ease from my printer, however, it has started defaulting to 5 x 7 and it will not allow me to reset on either the app or on the printer itself.  It is not bringing up a tray/paper management option in the settings option.  I have tried to restore factory defaults, turning off/on, unplugging and plugging back in.  I need help in getting this resolved.  My printer is the Envy 7858 All in one Printer 

[Dragon-Fur]

@jhwkr 

Welcome to the HP User Community.

If you have not done so

Open the front door on the printer - wait a few seconds - close the door.

Open the printer tray - remove the photo tray

Look inside to be sure "it looks right" - don't worry too much about "what" - if something is wrong, it might be obvious.

Replace the tray and close up the printer

If the photo tray was just stuck, not detected, or otherwise "not right", the act of removing it and replacing it might make a difference.

What else?

If you have not done so,

Uninstall the HP Smart application from Settings > Apps > Apps and Features

Restart the computer and log in

"Get" a fresh copy of the app from Microsoft Store

If you have not done so,

If the full driver printer software is installed,

Uninstall the printer software from Control Panel > icon view > Programs and Features

Restart the computer and log in

Download - Save - Install a fresh copy of the Full Feature Software / full driver printer software

Restart the computer and log in

Full Feature Software / full driver installation package - Information and Download

HP ENVY Photo 7800 All-in-One Print and Scan Driver and Accessories 

Uninstall Existing Printer Software (Full Feature Software)

Uninstall HP printer software and drivers

Control Panel > icon view > Programs and Features >

Find / Select > Uninstall the printer software

Restart the computer and log in

If software will not uninstall, appears to be removed and is “still hanging around” after you uninstall / Restart...

Microsoft:  Fix problems that block programs from being installed or removed

OR

Revo Uninstaller (Free version)

then

Restart the computer and log in

Basic Instructions - Install the Full Feature Software / Full Driver printer software

• If using VPN, shut it off to install software
• If the printer software is already installed, uninstall it from Programs and Features > Restart the computer and log in – Reference Uninstall HP printer software and drivers
• Download and Save the Full Feature Software installation package or the Easy Start Software
• Open File Explorer
• Navigate to the folder in which you saved the installation file  (likely Downloads)
• Reminder:  If using USB cable between printer and computer, disconnect the cable before installing software.
• Right-Click on the installation package and “Run as Administrator”
• If using Easy Start > When asked, opt for "Full Driver" (exact wording might vary).
• If using Easy Start > Skip any extra software / offers you do not want (wording varies).
• After the software is installed, Restart the computer and log in

NOTES

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Preparation > Check / enable the printer as the “Default Printer”

Settings > Devices > Printers and scanners

UNCHECK (clear box) Let Windows manage my default printer

Select (Left-Click) your printer from the list of printers > Manage > Set as Default

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Categories:  Alerts, Access to the Print and Scan Doctor (Windows), Warranty Check, HP Drivers / Software / Firmware Updates, How-to Videos, Bulletins/Notices, Lots of How-to Documents, Troubleshooting, Manuals > User Guides, Product Information (Specifications), more

When the website support page opens, Select (as available) a Category > Topic > Subtopic

HP ENVY Photo 7858 All-in-One Printer 

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