Although many of us prefer to use commercial software where you walk in to your local PC superstore and walk out with a boxed product, there's no reason why many of the free equivalents are not as or more useful than these commercial editions. Indeed, the main benefit of system maintenance software is that it's updated regularly. If a problem is found, the software developer will make a new build available as soon as possible. With commercial-grade software, you may not find new features until the next major revision.
Auslogics software will enable you to defragment your drive (Auslogics Disk Defrag 1.4.11), cleanse and optimise your Registry (Auslogics Registry Defrag 4.1.6) and even give a complete run down on your current system, installed peripherals and more (Auslogics System Information 1.1.7).
Moon's dark side is mountainous, rugged and never visible from the Earth
The groundwater basins in some areas of Tehran have been damaged irreversibly
This is the first time that any spacecraft on Mars has recorded air vibrations on the planet
Arctic sea ice is thickening at a faster rate during winter, thus slowing down long-term decline: NASA
But, the seasonal ice growth could only delay the demise of the Arctic ice cap for a few more decades