Antivirus Software
Avast Free antivirus (https://www.avast.com/en-au/index#pc)
PC Cleaning Tool
CCleaner (https://www.ccleaner.com/ccleaner)
AdwCleaner ( https://toolslib.net/downloads/viewdownload/1-adwcleaner )
PDF Viewer
Adobe Acrobat Reader DC (https://get.adobe.com/jp/reader/otherversions/)
PDF Printer
Bullzip PDF Printer (https://www.bullzip.com/products/pdf/download.php)
Cube PDF (Japanese)
(https://www.cube-soft.jp/cubepdf/index.php)
Archiver
7-Zip (https://www.7-zip.org/)
Ads Blocker
Adblock Plus (https://adblockplus.org/)
Media Player
VLC media player (https://www.videolan.org/vlc/)
Free Office
LibreOffice (https://www.libreoffice.org/download/download/)
LibreOffice (Japanese) (https://ja.libreoffice.org/download/libreoffice/)
Thunderbird (https://www.thunderbird.net/en-US/thunderbird/all/)
Partition Tool
EaseUS Partition Master Free (https://www.easeus.com/partition-manager/epm-free.html)