I have read reports of Windows running on RPi's but have no links to offer. Try Hackaday?
My experience with Windows on systems that meet the minimum spec (2GB RAM, 32GB drive) and is designed to run Windows is that you can run one, maybe two, simple programs (a browser and VNC) which is OK for minimal applications. It is frustratingly slow.
If you have a specific Windows only program, I would suggest seeing if you can get Wine (Windows emulator) to run on your Pi
I have found Raspberry Pi OS a fine operating system for its intended purposes. I control things and log the data. If you're just running a browser, go with that.
I have bought inexpensive widows laptops for around USD$80. I see that an RPi 4 and display costs about USD$95 and that's without case, keyboard or mouse.
There are two significant downsides to Windows. First, when an update comes, you system is rebooted (not good for 24/7 applications). Second, Windows updates for non-mainstream computers often are unsuccessful. I have brick which will attest to that.
While running windows on an RPi may be cool, it's like riding a bike with "ape" handlebars and fat, knobby tires on asphalt: looks cool, but goes slow and is a hassle.