Ubuntu is an open source operating system for computers. It is a Linux distribution based on the Debian architecture.
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Ubuntu review and compare
While it is well known that Windows has virus, everyone installs an antivirus out of the box (while with Windows Defender) already in place. There are a lot less viruses on Linux, and this makes it even more vulnerable, as anyone would hardly care to install anti viruses. Please use anti-viruses with Linux for better security.
With kernel modules coming every 6 months or so, Linux these days is highly updated in terms of hardware support. NVIDIA has out of the box drivers for Linux that support dual Graphics as well! Most of the hardware support is built in Kernel, making the hardware outperform in Linux than Windows. On the other hand, Linux might have some unsupported drivers, for some manufacturers, who are too lazy to migrate.
Gaming: This is where Linux blows Windows out of the water! Yeah, this is true. With Steam moving to Linux in a big way, gaming has never been more evolved. You will experience Games like never before, on Ubuntu. And Steam has set benchmarks for this. And since its introduction on Linux, Steam has been eating away from Windows platform slowly, but surely.
Enterprise: This is where Linux, I feel, is still lacking- enterprise and enterprise software. The Microsoft has its own ecosystem: Office, Outlook, Lync. Here, Linux does lack in terms of real usage of the Offices suites, that are available, and its maturity, though, it can catch up very quickly (LibreOffice, ThunderBird, Pidgin). Similarly for cloud support, Windows has full azure support (clients for VMs get downloaded and work out of the box).
Development: Well here Windows has everything, while Linux can't have Visual Studio. This is about to change (Visual Studio 2015 likely to introduce a Linux module). With .Net framework becoming Open Source, the ports will be available on Mono community real soon. Fingers crossed till then (Sept. 2015). All other, Linux has too (JAVA, Python etc etc.)
General Usability: Depends. Ubuntu experimenting with Unity, Windows with its Metero, no one knows what is going on. Windows will go down, if it goes forward with its Metero program (which it luckily did not, as we have seen in Windows 10 preview, so things look bright there). In the end, Usability depends on comfort, and how much the user is used to the interface. Ubuntu offers many (Gnome to KDE to Unity to Cinnamon to XFCE and what not), Windows has only one, love it or hate it.
Ubuntu is a good choice for those who want the latest and greatest features. It’s also backed by a much larger community so if you need help with something, there are plenty of tutorials and resources available. The only thing is, with many more features and frequent updates, things can become slightly more cumbersome.