On one hand, it is always good and rewarding to keep up-to-date with your software and use the latest OS. But on the other hand, it brings some hidden rocks too, for instance, privacy issues. And this starts from the very beginning, when you are still using your good old Windows 7 or 8 and suddenly are forced to upgrade it to Win 10 without even your consideration. No matter that it is offered to you for free. The most essential is that it's where spying on you starts. It's up to you whether to continue using Win 7 or 8 until it is supported, or switch to Win 10. You still have to be alert and very careful when reading all those terms and policies you sign and enable only those of them that are suitable for you, because this is the only way to protect your personal data at least to some degree.