But, be aware, the company says it may take a few weeks before everyone who registered is prompted to download Windows 10.
While Microsoft has not publicly stated its milestones, other than 1 billion installs after three years, seeing as they are publicly announcing this number so early means that they are pleased with the install rate.
Breaking down the math, 14,000,000 installs in 24 hours equates to 583,333 installs per hour, 9722 installs per minute and 162 installs per second.
Microsoft's pomp and circumstance around Windows 10 is far from over, in fact, it's only beginning. The company is now running a slew of advertisements for the OS and is pushing Windows 10 at every chance it can get.
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Source: Neowin - Brad Sams