With a new PC, you might be looking to buy a copy of Windows 10. But, if you're working on an older PC or hoping to install Windows on a Mac, you'll want to upgrade to Windows 10. Updating to the latest OS is the best way to make sure your PC stays secure, especially now that Windows 8 is considered vulnerable to a number of security risks. If you have an older computer running a legacy version of Windows, you'll want to find the best price for an upgrade to Windows 10, especially now that the deadline for the free update has passed.

We've rounded up the best deals available right now so you can upgrade to Windows 10 without breaking the bank. And, by grabbing Windows 10, you get access to Cortana assistance and faster performance, as well as important security-related features.

No matter if you've grabbed a great laptop, are putting together a new system, or just want to upgrade an older machine, you'll have to get a copy of Windows 10. To help you, we keep tabs on the latest prices of Microsoft's current OS so you can find the best deal. You'll also find more offers available right now, seeing as we're in the thick of back to school sales season.

Why buy Windows 10?

You may still be running your computer on Windows 7 or 8, and if so now's the time to buy Windows 10. This isn't just a performance update, Windows 10 brings new features and security settings to your machine that are crucial to getting your work done in today's operating systems. From the ease of the Cortana assistant to the speed boost you'll notice instantly, upgrading your older system to Windows 10 will be well worth your while.

Buy Windows 10 Home for the best price

The perfect version of Windows for home users

Windows 10 Home is the version that most people will need. It's for home use and includes game streaming from Xbox One and other consumer features like Cortana, as well as Windows Hello for logging into your PC via a fingerprint scanner or your face. If Windows 8 was the steepest learning curve imaginable, Windows 10 is like meeting a great friend you once knew again - it's just that they've bought some new clothes of which you really do approve. If you're looking to buy Windows 10 Home today, you'll find some excellent offers to save you some cash below.

Buy Windows 10 Pro for the cheapest price

Go Pro if you think it's worth paying more for the Pro features

Buy Windows 10 Pro if you need the extra security and management improvements over the Home version above. It includes Hyper-V for virtualization, BitLocker whole disk encryption, enterprise mode IE, Remote Desktop, a version of the Windows Store for your own business and assigned access (which locks a PC to running only one modern application, to use like a kiosk). Network admins can also schedule updates so they don't happen at important times.

Buy Windows 10 to install on a Mac

Another reason you might want to buy Windows 10 is you want to install the operating system on an Apple Mac computer. You can install Windows 10 on a Mac that is no older than 2015 by using Boot Camp Assistant, Apple's own utility. You will need between 64GB and 128GB of free storage space on your computer, as well as an external USB flash drive with at least 16GB of space in certain instances. Find out more about installing Windows 10 on a Mac via Apple Support. Once installed, you'll be able to switch between Mac OS and Windows 10 when you start up your computer.

You can also check out the best MacBook deals and sales right here on TechRadar.