Back up any important files
Sign out of accounts and remove saved passwords
Deauthorize software and subscriptions
Encrypt the drive if needed
Factory reset or wipe the hard drive securely
Remove and destroy sensitive storage if required
Remove batteries and separate hazardous components
Reuse, donate, or sell if the computer still works
Recycle through a certified e-waste facility
Follow local disposal regulations
Drop off peripherals separately if accepted
Keep proof of recycling or disposal if needed