Ten days and counting. If you haven’t yet taken advantage of the opportunity to upgrade to Windows 10 for free, that is all the time you have left.

Ironically, many of the people who have not yet upgraded to Windows 10 are also part of the “Microsoft is just trying to squeeze more money out of me” camp of conspiracy theorists. They’ll probably also still be first in line to complain about whatever price Microsoft decides to charge for Windows 10 once the exceedingly generous year of free upgrade eligibility expires. Go figure.

There have been a wide variety of justifications given for rejecting the free upgrade. Users love Windows 7—and for good reason. Windows 7 is a phenomenal operating system. If you like Windows 7, though, and you want to continue using the same software you’re already used to, you should still upgrade to Windows 10. As I noted in November:

The Windows 10 desktop and the way applications run in Windows 10 is very similar—almost identical in most cases—to the Windows 7 experience. The Start button is different by default, but even that can be customized to look and feel essentially like what you already have in Windows 7. Windows 10 also includes a variety of performance and security enhancements that make it better than Windows 7.

For those who have the hardware to take advantage of it, Windows 10 has a lot more to offer as well. Windows Hello authentication is amazing. Using Cortana—and more specifically the automatic voice response to “Hey Cortana”—can be quite liberating. The Edge browser, handwriting recognition, integration with Xbox, and many other features are all great reasons to make a switch to Windows 10.

Even if you don’t have fancy new hardware, though, and don’t plan to do anything different than you do now with your existing Windows operating system—you’ve got nothing to lose. It’s free. You can just upgrade and keep using your OS as you always have. The difference is that you’ll have the latest features and security controls, and you’ll at least have the option of using some of the cutting edge features if and when you upgrade your hardware.

In eleven days you’re going to have to pay some amount of money if you want to upgrade to Windows 10. You really don’t have any room to complain about what Windows 10 costs—no matter what amount that ends up being—after you’ve had an entire year to just get the OS for free. Tick, tock, tick, tock. Go download Windows 10 now.