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I see from the post that you are having issues scanning on your HP 2135 printer. Don't worry as I have a few steps to help you get through this concern,
To provide you with an accurate solution, I'll need a few more details:
How is the printer connected? USB/Wireless
Have you tried to perform a Hard reset on the printer, computer, router and other devices on the same network?
Let's start off by performing a Hard reset on the printer, router, computer and other devices on the same network.
The following steps temporarily disconnect network and Internet connections and require restarting your computer. Complete any tasks or downloads in progress before continuing.
1. Press the Power button on the printer to turn it off.
2. Disconnect the power cord from the rear of the printer.
3. Disconnect the power cord from the wireless router.
4. Turn off the computer.
5. Wait for 30 seconds.
6. Reconnect the power cord to the wireless router.
7. Wait for 30 seconds, or until the router is fully on and ready
8. Turn the computer back on.
9. Wait for the computer to reload
10. Reconnect the power cord to the rear of the printer.
11. Turn the printer back on.
Next thing, I would suggest here is to use Microsoft Fix It to remove the printer drivers.
Let's try these steps here:
1.) In Windows, search for and open Programs and features
2.) Select your HP Printer
3.) Select Uninstall
4.) In Windows, search for and open Devices and printers
5.) In the Devices and Printers windows look for your HP printer. If you see it listed right-click on it and choose 'Delete' or 'Remove Device'
6.) Open up the run command with the "Windows key + R" key combo.
7.) Type printui.exe /s and click Ok. (Note: there is a space in between “printui.exe” and “/s”)
8.) Click on the "Drivers" tab
9.) Look for HP Printer driver. If you see it Click on it and click Remove at the bottom
10.) Select Ok
11.) Select Apply and Ok on the Print Server Properties windows