You can use one of the workarounds listed below if you want to prevent your default printer from changing on Windows 10
If your default printer keeps changing on your PC on Windows 10 then it can be a minor issue but still an annoying one and here are some issues reported by the users while speaking of printer problems
Windows 10 automatically manages your default printer and you might want to prevent Windows from managing your default printer if it keeps changing.
The issue might be related to your registry if your default printer keeps changing and you can fix the problem simply by making a couple of changes in the registry editor
If the above-mentioned solution doesn't work out then you need to uninstall the drivers of the printer and install the latest driver version again. To uninstall the printer driver follow these steps
The issues with the default printer can also occur due to the problems with cables so make sure to check if your cables are working properly or not if your default printer keeps changing on your PC.
Sometimes your USB or power cable might be broken, which can lead to these issues so carefully inspect the cables and make sure that your printer is constantly connected to your PC.