Why Windows is quite "fat"?
Installing a Windows operating system usually requires much more disk space as well as memory. Can you figure out why the Debian operating system you installed can be so "slim"?
应该不用我翻译吧。。

因为win自带了一大堆用不着的软件和一堆服务。

Debian is also fat when it compare with puppy Linux lol. I think Windows comes with many service so it cost lots of resources. the hardware becomes cheaper and cheaper is one reason, too. BTW not all Windows are fat...