AppNee figured out that only very few people like or are used to use firewall, whether it's the one Windows built-in or from a variety of antivirus software. As a security software, GlassWire abandoned the tedious UI and operation in traditional security, monitoring software, instead, it visualized all the normal and useful operation - which is just the easiest to be accepted by non advanced users.
In addition to a lot of junk files, useless system components and services that will make your Windows run slower and slower, another possible reason is all kinds of malicious software are haunting in the background. In this case, you might as well try to use SUPERAntiSpyware to scan, check and remove them.
If use simple words to generalize System Explorer, AppNee gives that like this: it is the most perfect and complete alternative to the Windows built-in Task Manager. It has more detailed and authoritative system info collecting and displaying functions in expert level, but with fool-readable GUI. It's trusted and award-winning, and completely free for both personal and commercial use!