To do the clean install, plug the Win 11 USB in with PC fully powered off. Then power on and tap F12. When the F12 menu opens, select the option to boot from USB and follow the prompts. Win 11 will probably install all the drivers you need. If any problems come up or if a driver is missing, you can find all the Win 11 drivers and whatever Dell software you need on the Support site.  Enter your Service Tag on that page which should help you find drivers specific for your hardware. Why not just do an update from Win 10 to Win 11, rather than a clean install? That way you shouldn't have to reinstall all your apps.
 I want to do a clean install of Win11 on my XPS15 (Win10 Pro).  Dell's OS Recovery appears to only allow me to restore Win10.  I created a Win11 USB installation, using the Microsoft's Media Creation Tool, on my XPS15-9570.   So do I just boot from the USB drive and hope for the best?  What do I about all the Dell-specific drivers and support software? Thanks for your advice, Steve PS I've done backups of all my files and have files to re-install MS-Office, Adobe Photoshop, Quicken, etc.
Need Help To Do a Clean Windows 11 Install on my XPS15-9570