I've got a couple yr old Kindle Fire HD 8.9" and it's stuck in a boot loop - most likely due to water damage. It will load...

Louis, This is most likely a bad solder or wiggly power connection on the battery. The video below gives you a decent “how to” for replacing the battery, but should also allow you to check connections. Though I recommend using correct tools, instead of improvising. iFixit has a nice tool package for sale that works for repairs like this. (1) https://www.youtube.com/watch?v=ivFewiec... -e

It’s possible that the connection was just knocked loose. TronixFix is a really good youtuber that shows how to do repairs step-by-step. Instead of repeating his tutorial here, I’ll just post the video for replacing the screen. You can use that video to check the connections as well. https://www.youtube.com/watch?v=r0O_bRUF... -e

David, What I’m reading is that you tried to reset “something” but instead of resetting it just shut down. Then when turning it back on, you’re getting a boot-loop. I’m going to assume in this answer that you’re talking about a PC running Windows 10 as this is the most common PC in the world right now. Accidental Shutdown: This can be caused by holding the power button down for more than 5 full seconds. Most motherboards power off when the power button is held down for 5+ full seconds. This could also be caused by a jammed power button, which could also be resetting your system. Though most likely the system was hard-locked when you went to reset it, and since it didn’t reset right away, you held the power button down until it powered off. Boot-Loop: Restart loops usually occur when Windows is trying to self-update and is interrupted. Though other corruption can be the cause as well. Anything from a bad peripheral (bad video-card, bad third party card, etc.). In Windows 10 you can press CTRL-F8 to get the...

Unless you've removed the backup that Windows 10 makes when it's installed. You can roll back pretty easily. If you have removed the rollback data, or the Windows.OLD directory. Then you're looking at a reinstall from scratch to roll back. (1) First, backup your important data. If something goes wrong you dont want to lose the family photos or taxes. (2) Once you've backed up your data. Click the Start Menu, then settings (3) There's a button for "Update and Security" click that (looks like a backward rolling arrow). (4) Select the Recovery tab, and then choose "Go back to Windows 8.1 (or 8, or 7 whatever you ugpraded from). (5) Microsoft Nag screen will come up asking why you would want to go back, and will give you some reminders about passwords, etc. Remember your old passwords from your old OS, they will get restored as well. (6) Pretty much keep clicking next and follow the on-screen prompts. There can be some flakiness with missing icons, etc. and you may need to reinstall some of your software.

While the Aaron's response tells the solution; the answer to the question is manifold. Buddika's answer was quite good. Here are some other things to think about: (1) Computer hardware is static. (1.1) Computer hardware doesn't self-upgrade and so will always perform at a maximum of the level of it's current hardware. You can replace parts, bigger HDD, better Proc, etc. But unless you actually physically change the makeup of the computer, you're still talking about a limited budget for horsepower. (2) Operating Systems are dynamic. (2.1) Windows especially has software creep. As bugs and exploits are found, the OS is gradually updated over time. This causes "Software Bloat" which can really tax your system. Remember you're still running with a limited budget. So the more the OS takes up, the less is available for other things. (3) Programmers program for the future. (3.1) Applications (especially games) are designed for the current generation of PC's. With PC's always getting upgraded and faster the bar...