It took long enough, but Windows 8 has finally made its grand entrance.
Those looking to upgrade to Microsoft's tile-centric new look can do so from today -- if you take the plunge with the new software, tell us whether you're impressed or not in the comments below, or on our Facebook wall.
Windows 8 comes in four flavours -- Windows 8, Windows 8 Pro, Windows 8 Enterprise (for businesses) and Windows RT, which is the tablet-bound version that will be running on tablets like the Microsoft Surface.
If you've got a PC running Windows XP, Windows Vista or Windows 7, you can download Windows 8 Pro for a modest £25. Before you can get the software you'll need to comply with the officious-sounding Windows 8 Upgrade Assistant, which will calculate whether your machine has the guts to handle the colourful new platform.
If you're on Windows 7, your files, settings and software will be transferred over when you upgrade. If you're running an older version of Windows, you'll need to reinstall programs after making the switch.
If you own a PC purchased after 2 June, you can get Windows 8 Pro for the slightly cheaper price of £15, but you need to fill out an online form first.
If you're looking to buy a fresh computer, my heroic colleague Andrew has made a list of the top five Windows 8 computers. If, however, you're observing Windows 8 from the sidelines rather than downloading the new software yourself, you'll be interested to read our history of how Windows took over the world.