New Delhi: With blue as the theme colour, Microsoft on Wednesday launched with much fanfare its new operating system Windows 10, which will be a free upgrade for existing clients for a year, while priced at $199 as a new package.

In a huge hall at the capital's largest exposition ground, the Pragati Maidan, Microsoft India chairman Bhaskar Pramanik and Windows director Vineet Durani opened Windows 10 to the Indian market, with which the Redmond, Washington-based company intends to compete with well-entrenched rivals like Google and Apple.