Error - printing

[TerryMarsh]

I've just bought the 7720 and want to use it via USB to my computer. The Print and Scan Doctor finds the printer, but I've had to turn wireless on to do that. But when I try to print or scan a document, the only way I can achieve this is to run Print and Scan Doctor again. My desktop PC does not have WiFi. If I try to run HP Scan I'm told the system cannot find the printer. I'm on the brink of returning this printer. Any help would be appreciated; it's a waste of time - and at my age I don't have a lot left - trying to get anything out of customer service.

[Andr-1611]

Hello @TerryMarsh ,
Welcome to the HP Support Community!

The HP software must be completely uninstalled and removed of the system, see below 2).

First download only this complete package: "HP OfficeJet Pro 7720 Wide Format All-in-One Print and Scan Driver and Accessories ",

1) File name: OJ7720_Full_WebPack_44.3.2219.exe (206.7 MB)

Then proceed as follows:

Check the system for

• TuneUp`s
• Optimization Tools
• Cleanup Tools

disable them, better uninstall them. Next...

1. Disconnect printer/scanner from computer- Disable WLAN, WiFi and/or remove the USB or LAN cable.- Do not switch off the printer >> unplug the power cord from the socket!
2. right-click Start, search for "control panel" and open "Programs and Features"
   uninstall all HP printer software > via "Programs and Features"
3. right-click Start, search for "control panel" and open "Devices and Printers"
   In the "Devices and Printers" window look for your HP Printer. If you see it listed, right-click on it and choose "Delete" or "Remove Device.”
4. Restart the PC
5. Close all programs
6. Change File-Explorer-Settings:View > Options > "Change folder and search options" > Tab "View"
   • enable > Show hidden files, folders and drives
   • uncheck > Hide protected operating system files (Recommended)
   OK
7. search for "HP [printer name]" and delete all this folders
8. Empty the TEMP folders
   A) C:\Users\[Your user account]\AppData\Local\Temp\
   B) C:\Windows\Temp\
system files cannot be deleted!
9. Reconnect the printer to the power supply and switch it on (if this does not happen automatically)
10. Please note: WLAN has to be deactivated!
11. Restart the PC
12. Close all programs
13. Open up the run command with the "Windows Key + R" key combo > in folder Downloads click on the EXE 1), see above.
    Via USB, means wait until the installation asks to connect the printer/scanner.
14. The installation was completed successfully, now you must ...
15. Restart the PC again
16. Now the installation is complete.

Document error messages accurately, even better is to take a screenshot of it and upload here.

Important information:

Change back the File Explorer settings -
• enable > Don`t show hidden files, folders or drives
• click button > Hide protected operating system files (Recommended)
OK

2) If you have problems with uninstalling, then read here: Uninstall HP printer software and drivers 

Hope this helps! Keep me posted.
Andr-1611

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