Well, that was quick. One week ago, I downloaded Windows 10 for my Lenovo Yoga 2 Pro laptop (late 2013 vintage) as a purported “upgrade” for my schizophrenic but functional Windows 8.1. As of today, I have booted Windows 10 out the window and returned to 8.1. Thank you, Microsoft, for giving me a thirty-day grace period to get out. But that is all the appreciation I can muster for you.
Many people have encountered serious problems switching to Windows 10; others have had no issues. In my case, the problem was the laptop display flashing or blanking out. Other Yoga 2 Pro users had this same problem — the cause seems to be a “panel refresh” option in the display driver. To get rid of the problem, you can roll back the display driver to a previous version and turn off panel refresh. But this fix lasts only until Windows 10 scans your drivers, detects that your driver is out-of-date, and reinstalls newer drivers (without giving you a choice), which reintroduces the display problem.
I am not going to spend hours fighting Windows 10. You win, Microsoft. I retreat.
We have two laptops in our family. Both had Windows 8.1 and I chose to upgrade both of them to Windows 10. And both of our laptops had problems. Although I decided to throw in the towel on mine, I was able to fix the touchpad functionality on my wife’s Asus laptop by installing a program called “Smart Gesture.” Again, the only reason I knew about this is because other Asus owners had the same issue.
Microsoft, do me a favor: if you intend to uninstall Smart Gesture from my wife’s laptop, please tell Windows to do so in the next 23 days, so I can throw her copy of Windows 10 out the same window I threw mine.

Just give me back 7! I don’t need this fancy-pants nonsense!
I agree. But a faster 7. How about 7.11.
I’ll be dragged away from Windows 7 kicking and screaming when there is a piece of software or hardware that I can’t live without which requires Windows 10.
Simply solved, get a Mac!
What Michael said. This is the 21st century.
While we’re on this subject, I would add just how horrible “outlook” is compared to gmail
Thankfully, only had to deal with Outlook a short time. Much shorter a time than I had to endure the pain of Lotus Notes. (Does that still exist?)