The Windows 10 Codec Pack is a free easy to install bundle of codecs/filters/splitters used for playing back movie and music files. After installation you will be able to play 99.9% of files on the internet.
MalwareBytes
Removes even the most stubborn malware.
Spam Bully
Spam Bully can eliminate up to 99% of spam.
AVG Anti-Virus
Well-known free antivirus protection software.
WinZip
WinZip is the world's #1 zip utility.
Download Manager
Free download manager & internet accelerator.