These are a few of my favorite tools:

A great tool to help clean up a Malware mess or help prevent one from happening: Malwarebytes

Free Antivirus for the average "safe" user (it's worth paying for good protection if you are a "risky" user -- or have one in your family): Microsoft Security Essentials

Java should always be kept up to date -- and remove all older versions:

Stardock created this lovely tool to bring back the Windows 7 feel to Windows 10: Start10 -- they also have other tools worth having a look  to assist in organizing your icon riddled desktop: Fences 

Micorosft Office-like software to give you basic Word, Excel and PowerPoint, Free:  OpenOffice

Great cross-platform video playback software with the ability to playback many file types: VLC