Typically you need to disable Secure Boot in the BIOS to get Linux up and running on a Windows PC. I believe there are some versions that support secure-boot, but I'm pretty sure Debian with Raspberry Pi Desktop does not.
* Writing an image to a USB flash drive will erase anything previously on it.
* Similarly, installing Linux with the use-entire-disk option will erase Windows and all prior data.
* Don't forget to back up any documents, pictures or whatever else you don't want to lose before proceeding.
Now on to the kick-Windows-to-the-curb party
Download Debian with Raspberry Pi Desktop from here: https://www.raspberrypi.org/downloads/r ... i-desktop/
Download the Etcher image writing software from here: https://www.balena.io/etcher/
Use Etcher to write the .iso to an empty USB flash drive, and test boot that in your Windows PC (don't forget to disable secure boot). You can run it live without installing anything just to see if you like it. Then you have the option of installing it along side of Windows (dual-boot with a boot menu), or just replacing Windows and having Linux only.
To get your Windows PC to boot from USB there are usually several options. Often there is a hot-key to bring up a boot menu when the system is started (F12 is common, but not universal, check your manual). You can also hold left-shift while restarting Windows 10 and you'll get an options screen with something along the lines of Use Device, and from there you can select your USB drive to boot from.
When the USB drive boots you'll have several options which should be pretty self-explanatory. The Live options run directly from the USB drive and make no changes to your Windows drive. Persistence means that any changes you make are saved to the USB drive and will be available on next boot (no persistence means anything you create, edit or install will be gone when the system is rebooted).
When you are done testing the Live version, you can install it to your HDD/SSD. There are text or graphical installers. They do the same thing, but the graphical installer is more point and click. If you decide to install it along side of Windows (dual-boot) you first need to free up some room for Linux (shrink the Windows partition to make room for Linux), unless you have the option of installing it to a second drive.
If you just want to get rid of Windows altogether, then choose the Use Entire Disk option for the installation. This will re-partition and format the drive for Linux, which will erase Windows and everything else that was previously on it.
For more information
My mind is like a browser. 27 tabs are open, 9 aren't responding,
lots of pop-ups...and where is that annoying music coming from?