List of useful software
Malwarebytes installs without interfering with existing anti-virus programs. I use this program to clean up any viruses left by combofix.
MiscellaneousCcleaner is probably the only cleaning program I trust. It removes temporary files and cleans up redundant registry links. I have seen a few other programs that try and do this and totally bork the registry.
NMap is an IP Scanning tool. It is good for finding network security issues as well as finding lost devices on a network.
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WinDirStat is program that shows a graph of all of your directories and their size. This allows you to drill down and find where your disk space is going. Or you can just buy a 3Tb Hard Disk Drive
Flash Player is necessary to play videos on the web
Flash Player Removal tools