FREE Windows Critical Updates:
Windows Update
 
FREE Malware / Spyware Removal Software:
SuperAntiSpyware
Malwarebytes Anti-Malware
 
FREE Anti-Virus Software:
Microsoft Security Essentials
 
FREE Productivity Tools:
LibreOffice
VLC Media Player
CDBurnerXP
ImgBurn
DVDFab HD Decrypter
DVD Shrink
ATF Cleaner
Kill Copy