To disable the option that allows Windows to manage your default printers automatically, follow these simple steps:

Step 1: Open Settings

Press Windows + I to open the Settings app.

Step 2: Go to Printers & Scanners

Click on Bluetooth & devices in the sidebar, then select Printers & scanners.

Step 3: Turn Off Automatic Management

Scroll down and find the "Let Windows manage my default printer" option. Toggle it off.

Scroll down until you see the option labelled "Allow Windows manage my default printer."

There will be a toggle switch next to this option. If it's turned on (showing as blue), click the toggle to turn it off (it will turn grey).

Once you’ve done this, Windows will no longer automatically manage your default printer. You can now manually select which printer you want to use as the default.