My mom's computer was running pretty slowly, so she asked me to troubleshoot it and try to find a way to speed it up. I checked the activity monitor on her computer and found that her hard drive's disk usage was often pegged at 100% while her CPU (central processing unit) and RAM (random-access memory) had plenty of headroom. Since she was using a HDD (hard disk drive), I advised her to upgrade to an SSD (solid-state disk).
I recently had a bad experience with the built-in backup tool provided in Windows 10. Backups can backup just your personal files without backing up any programs you have installed, or they backup everything on your computer including programs and settings. Disk image backups save everything: files, programs, and settings.
Windows 10 has a couple features that, for me, were killer features when I first heard about them: Virtual Desktops, and copy/paste keyboard shortcuts that work in the console. When Windows 10 was finally released, I quickly upgraded both my laptop and desktop from Windows 8.1. (I had found Windows 8 to be a bit of a usability disaster, but Windows 8.1 fixed most of those issues.)