[unregistereddev]

Windows 95 and 98 came with QBasic, but it was not installed by default. It was an optional "extra feature" that could be added from your Windows installation media.

I do not know about earlier versions of Windows.

[LtWorf]

qbasic is not a C compiler. It was also not possible to make windows applications with it… and it lacked the option to generate a .exe file.

It was more of a toy.

[unregistereddev]

I apologize for misreading your post, I thought you asserted that Windows did not come with QBasic. I'm well aware of what QBasic was - it's what I used when I first learned programming. It was an excellent toy for 12yo me.