I doubt the default USB HID mouse driver in Windows is needlessly big. Just don't use the hideous bloatware that comes with the mouse. I've never had to worry a

I doubt the default USB HID mouse driver in Windows is needlessly big. Just don't use the hideous bloatware that comes with the mouse. I've never had to worry about mouse drivers on Windows in the past probably 20 years, even wireless mice. They just work without thinking. It's much better than the 1980s-90s. You probably don't use an ancient OS as a daily driver so maybe those extra megabytes really are needed for something important after-all. I'm not saying Windows is super well optimized for space but you can't count the whole growth as waste. Even the default Raspbian Linux for Raspberry Pi requires several GB of storage.