Just a quick heads up, Windows 10 won’t be free for much longer. On July 29, Microsoft plans to shut down the free upgrade option for its latest operating system — and will force users to pay. Some people don’t want Windows 10, and will be happy to see the end of those nagging upgrade prompts. But if you want the new OS, but keep putting it off, now is the time to act. If you wait until August, it will cost you a pretty penny.