For those who had the misfortune of having to use Windows 8, the organisation's move into double digits took too long.
So what do we make of Windows 10 and its new features?
Here's the verdict
Microsoft's digital assistant is perhaps the software's best feature because this is the first time we will have a desktop-based personal assistant that talks back to us.
Apple is yet to bring Siri to OS X, so Cortana has every opportunity to give Windows 10 that extra edge over its competitors.
While it will take some learning, The Guardian reports that it can remember previous questions, TV shows and talk back to you if you ask it a question, instead of typing it.
According to Forbes, users said that the update is automatically installing new drivers on their system.
The only way to solve this problem is to either hack the software or uninstall third party drivers.
Dubbed as the browser that will kill Internet Explorer, Edge has been given a thumbs up by reviewers.
The browser's most note-worthy feature is one that will allow us to annotate internet pages as we go along. The only disadvantage is that once you've added your notes, you won't be able to change anything -- much the same as what happens once you've flattened an image in Photoshop.
Some users have even said that it could beat Chrome, but it is still too early to tell if this will become a view held by the majority.
Microsoft Edge completely beats Google Chrome in a lot of aspects. So far so good #Windows10— Gaddy (@RandomAtlai) July 29, 2015
First impressions of #Windows10: easy to upgrade; simple to use; Microsoft Edge looks great... they may have actually built something good!— Doron Salomon (@DoronSalomon) July 29, 2015
This feature will a precious one to most gamers as it integrates Xbox friends list, messages and activity feeds with PCs.
What this effectively means is that you can keep in touch with Xbox friends without actually having to use the console.
The app will also allow you to stream games from the Xbox One to your PC -- handy if you are running short of screens.
This has of course, made quite a few people happy.
Continuum was undoubtedly designed to optimise the Windows 10 experience across both tablet and desktop as it gives users the option to seamlessly switch between both modes.
In tablet mode, the OS is touch-friendly and displays open apps in full-screen.
I m so excited about Talkman native pen support split screen functionality iris scanner continuum feature and power of #Windows10 😘 👍 👌— Parth Shah (@parth2eetstech) July 24, 2015
The final verdict
So far, the majority of users seem to be happy customers with some Windows 7 fans simply watching and waiting for others to weather the software's teething problems.
*looks around shyly* But... But I-I'm fine with my Windows7...July 29, 2015
Trying to get #Windows10 - need the app-went to the Store-app not on homepage-and there's no way to search the Store! Huh?!— Geoff White (@geoffwhite247) July 29, 2015
Installing this has been a bit of a hassle #Windows10— The Maverick Nerd (@GiordySays) July 29, 2015
Great job you guys at Microsoft. #Windows10 is actually a quite usable version for desktop again.— Markus Hafellner (@MHafellner) July 29, 2015
downloading #Windows10 !! happiness level 10 !!— Patricio Gonzalez (@JPatricioGS) July 29, 2015
Ahead of the launch event in London tonight, Terry Myerson, executive vice president, Windows and Devices Group, at Microsoft said:
"A new era of Windows starts today. From the beginning, Windows 10 has been unique — built with feedback from over 5 million fans, delivered as a service and offered as a free upgrade”
“Windows 10 delivers on our more personal computing vision, with a natural, mobile and trusted experience. Along with our partners, we’re excited to deliver the best Windows ever, which will empower people and organisations around the world to do great things.”
For now, users seem to quite happy with Window's new era.