It was smart enough to recognize our SSD and not defrag it, though. It lets you set automatic and boot time defrags, as well - but you might want to program those to happen when you're not using your computer, as the program took upwards of 30 minutes to defrag when we tested it. Once you have Smart Defrag 3 installed, you'll be very happy with its futuristic layout that offers some customization and a nice hard drive map that is a delight to read. We're not kidding about replacing, either - the program will turn off your usual defragmenter and install other programs if you don't uncheck those options during install, so be careful. This program tries to replace Windows' default defragmentation widget by being more advanced and offering more style, features, and customizations. Still, it makes up for that pestering with performance that rivals most defrag programs for Windows.

It throws recommendations for other programs at you at every turn. Smart Defrag 3 hits all the notes you'd expect from a defragger, but it is too aggressive in terms of advertising.

Windows 10 disk defragmenter