Need printer software? Match the model before downloading.
An old CD is rarely the best starting point. Some printers use built-in Windows support or AirPrint; others need the manufacturer’s current software for your exact setup.
Software or drivers out of date? Update the right thing.
Start with the app or device that needs attention. Use its trusted update source, then check the result before making another change.
Set up a network printer. Connect it, then test it.
Put the printer on the intended network, add it to the computer and check a real test page. Scanning and shared-office access need their own checks.
USB device not recognised? Check the path before resetting it.
Charging, appearing in an app and being detected by the computer are different things. Identify the accessory, protect any stored files and compare one connection at a time.
An app keeps freezing or closing? Find what triggers it first.
A frozen window, one troublesome document and a computer that restarts are different problems. Start with what still responds, then work through the relevant checks.
Windows stopped with an error? Record it before changing things.
A stop code is a clue, not a diagnosis. Check whether Windows starts again, protect important files and make one relevant change at a time.