CCleaner - Clears out junk that may slow you down
CPU-Z - Identifies components
HWMonitor - Displays sensor information
Malware and Virus Protection
Open Source Software
Keepass - Creates and stores passwords securely.
Encryptr - Encrypted, private cloud based wallet.
Diceware - Create random, strong yet memorable passwords.
CD Burner XP - Burn anything to disc completely free.