T o begin with your question is pretty open-ended as it is not very clear what purpose you are going to be using your system for. Both of these operating systems have their own pros and cons. But still here is a general comparison between the two Operating Systems- 1) Software
Windows 7 by default has very minimal software set, the basic features that we need – word processor, spread sheet and a presentation software are not present. You’ll have to purchase and install the MS Office suite separately, this is something that should be bundled with the operating system. The question I ask is “What good is an operating system, if it doesn’t provide the basic features?” On the other hand Ubuntu 12.04 comes with the LibreOffice suite (a Microsoft Office Equivalent) preinstalled. It also has F-spot, an image editing program that and an Instant messaging client called Empathy – that has chat provisioning for Facebook, G-Talk, Yahoo,MSN and VOIP capabilities all under a single application.
2) Media
Windows comes with Windows media player, which is pretty much useless without codecs, as majority of the videos/movies that we watch require codecs like Xvid. So there is a need to download a codec pack before Windows media player becomes fully functional. Ubuntu is bundled with Movie Player, and also requires downloading codecs. However, in both the operating systems, it is very easy to watch videos by simply installing VLC media player.
3) Security
I believe that Linux will always be much more secure than Windows operating system given the fact that its open-source. It would interest you to know that there is something called as the ‘Linus Law’ – named after the creator of the Linux kernel Linus Torvalds , which states : given enough eyeballs, all bugs are shallow In simple terms it means given a large number of developers and beta testers, every problem will be identified quickly and that the solution of that problem will be obvious to someone. I completely agree with this.
4) Availability of Software
Since Ubuntu/Linux has a relatively less market share, availability of popular software for Ubuntu is a major concern. Some users are forced to stay with windows since their favorite software is not available on the Linux platform.Though this has recently changed and many commonly used programs have now been ported to Ubuntu. However, some advanced commercial software like the Adobe suite (Dreamweaver,Photoshop etc.) is not available on Linux, due to which, thousands of web developers and designers choose Windows over Linux.
5) Gaming
Gaming support is another aspect of an operating system. While Linux does have many games, it certainly cannot match Windows 7 in this area. Most of the high-end games have been built for the Windows platform, that make extensive use of Microsoft DirectX. So its not hard to say that Windows 7 should be definitely your choice if you are a gamer.
Conclusion- Both of the OSs have their advantages and disadvantages , finally it is up to you to decide which one suits you better. I personally like Ubuntu over Windows , but in case you are a regular Windows user and are not pleased with the Ubuntu user interface, there is another distribution of Ubuntu called Kubuntu which has a marvelous user interface,its very easy to use and is similar to the look and feel of Windows 7 in many aspects.
Linux/Unix, Operating system is much better than windows Operating system, because for linux there is no virus creates . its safe and secure operating system.
I really value the fact that you don't need to install a GUI on your linux. this makes using linux much faster, and you get clear feedback why thing don't work, if they don't work. Sure you can install the Windows linux subsystem, but you're still stuck with a slow overbording UI and you can't just SSH in and run your tools remotely, start your machine learning job, or run your application server. Also you get to choose what updates you install and when, there is eg no sudden feature loss through forced auto update. You can also choose to only install the components you need which generally results in a smaller specialized system that offers less target space for an attacker.