This post is meant as a warning. Windows 10 is slow, flaky spyware. If you don't believe me, check out the numerous 1-star reviews on Amazon.
[Update 08/13/2016] This afternoon I successfully restored Windows 8.1 on my tablet. Having 80% memory in use just from booting up, not to mention constant CPU load, got old fast. Now the initial memory load is 58% and the CPU gets sufficient downtime to down-clock to 560 MHz. I was fortunate; others online have reported failure when using Windows 10's go-back feature. The only hitch was having to reinstall 3rd-party apps like Shazam (however, in this case all my previous Shazams were preserved).
The BadThink of Windows 10 as a reincarnation of Windows ME, except that now we have always-on broadband rather than dial-up so it can phone-home about everything you do.
It wasn't this bad before. When I first got into the Insider program they had just released Build 9926, which worked brilliantly. The only fault I found was that it didn't fully support the multimonitor feature on my outdated video card (but the card could accelerate everything perfectly, so the UI was quick and snappy like XP). I had left XP to beta-test and was very satisfied. It was so stable that I stayed with it and made it my "production" OS. I hope to stress the irony that the beta worked better than the release. As I said before, gotta love mandatory updates.
Things turned bad a few months after the big 2015 public release. Unless I'm quite mistaken, it was a certain update that made Windows 10 as bad as it is now. After having to reboot one day, I started getting Out of Memory dialogs all the time. The problem was, I was running a light-normal program load on 2GB RAM, and this had never happened before. Windows XP handled bigger loads without complaining, and so did earlier Windows 10 builds. I checked Task Manager but it reported nowhere near even 80% memory load. I was treading on thin ice whenever I opened anything now. My computer was essentially useless, not to mention getting slower every day.
All this happened because Microsoft now owned my PC. But it gets worse. Once I was syncing a Bitcoin "node" overnight. In case you've never heard of one, a Bitcoin node is a server that somehow supports the Bitcoin network. You can't close it without waiting for it to save everything or you lose the entire transaction history, which right now is 85GB. On this night Windows 10 had installed an update and "helpfully" rebooted for me without asking. This behavior is unprecedented and unacceptable in production environments.
Then there's the Start menu. Aside from being an annoying layout, I have to ask, what is the UI running on? Some kind of "Universal" emulator? Assuming you have a decent PC, a menu should fly onto the screen as in earlier versions. Clicking something in Windows 10 often took so long to respond that I thought my mouse was broken and I would click again.
And here's something really scary. Forget the constant spying and stories of keyloggers. Windows Update now has peer-to-peer functionality. In other words, Microsoft is saving themselves Internet traffic by having Windows 10 PC's "torrent" updates to each other. Does that not sound like a hacker's dream? Windows already forces updates, so what happens when (not if) someone writes a bogus update and pushes it onto the P2P update system?
Here's how my tablet (also 2 GB RAM) reacted to Windows 10. It came with Windows 8.1 and never had issues. Now, I boot it up and Skype loads automatically, minimized, as usual. I open Opera, whose recent releases are praised for low memory consumption. I open 2 YouTube tabs and, "Your computer is low on memory" after which the screen will sometimes randomly scramble like bad digital TV. And if I close everything, Windows' own Universal apps like Email (BTW, the new Email is inferior to the Windows 8.1 version) have trouble running without triggering a low-memory error. My tablet has become little more than a paperweight.
Microsoft's tech support is pretty amazing. During a support call on July 25 I gave permission to do a remote-desktop control session and the tech, Lizell D, upgraded my tablet for me. I would've done it myself, but Microsoft's upgrader complained of needing about 16 GB free space which isn't possible on a 32GB tablet. Microsoft must really want Windows 10 installed for them to provide me with a 50 minute support call for free.
I also received an email from Microsoft on July 29. Here's how it began:
Subject: Thank you for making the first year of Windows 10 amazing.
Hello Windows Insider –
Over the last year, Windows Insiders like you have continued to help make Windows 10 even more amazing. Today, we celebrate the one-year anniversary by celebrating you, our Insiders. Thanks to your feedback, Windows is the best it can be — and getting better every day.
As for the subject, the only thing amazing about the first year (July 2015-July 2016) was that Microsoft got to release something without spending anything on pre-release testing.
"Windows is the best it can be". Define "best".
"And getting better every day." I can almost buy that.
Microsoft claims Windows 10 is the last version and that from now on it'll just be updates. I find that hard to believe. I'm sure years from now they won't be able to resist releasing Windows 11 or 12. But if it's true then maybe Microsoft will someday get its act together and Windows 10 will be fixed through updates, a little like how they fixed Vista by patching bugs and then calling it Windows 7.