This post will let you know how to install Tamil or any other regional language that you use in your Windows 10 machine. In Windows 7, I was able to view Tamil fonts in Chrome, IE and in other in-built apps. But after upgrading to Windows 10, I could not view these Tamil fonts in any of my apps. I did a little search, found a fix and I am going to share it to my fellow Tamil folks!
Before I start, Let me tell you why it's not working in Windows 10. Windows 7 had some pre-installed Tamil fonts like Latha and Vijaya by default. But in Windows 10, these fonts had been moved to a pack called "Supplemental Tamil Fonts" which is marked as a Optional feature. So enabling this optional feature, will help us to get our language back.