Windows PC has a feature built right into the BIOS but you have to enable it by booting it into the BIOS mode. Here is a step by step guide to tell you how you can enable that to automatically turn on your PC at a scheduled time.
Steps to turn on your PC on schedule
Wrapping up
This is how you can set up an alarm to turn on your PC on schedule automatically. Make sure that your PC is turned on from the power socket or it obviously won’t boot up. However, laptops will boot up without the need to attach it to the charger. Also, read How to Stop Windows from Updating Automatically