(Here's how you can download Windows 11 now and skip the wait.) No matter the reason you're still using Windows 10, some of the OS's default settings collect information, make you see more ads and notifications, and may be slowing down your device. Some people will be using Microsoft's older OS until mid-2022, while others debating if upgrading to Windows 11 is worth it, may keep Windows 10 until support ends in 2025. The new operating system's gradual rollout means not everyone will get the upgrade right away. Microsoft's Windows 11 operating system started rolling out to eligible devices Oct. Using Windows 10? Change these default settings now.