All, I've been using quite a few free tools for a long time to keep my computer running smooth. I thought I would start a list and see how many other similar products people can post. A few rules to actual make the thread useful: 1.) Product has to be 100% Free - No "Free Trial" or "Limited Functionality" 2.) Has to be clean - Absolutely NO MALWARE My few are: CCleaner - CCleaner is a freeware system optimization, privacy and cleaning tool. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. Additionally it contains a fully featured registry cleaner. But the best part is that it's fast (normally taking less than a second to run) and contains NO Spyware or Adware! MalwareBytes Anti Malware - Malwarebytes have created an easy-to-use, simple, and effective anti-malware application. Whether you know it or not your computer is always at risk of becoming infected with viruses, worms, trojans, rootkits, dialers, spyware, and malware that are constantly evolving and becoming harder to detect and remove. Only the most sophisticated anti-malware techniques can detect and remove these malicious programs from your computer. ThreatFire - ThreatFire employs an intelligent behavioral engine to only alert you on truly malicious behavior, because sometimes even legitimate software may look malicious. This means you are only alerted when you really need to be. Its available with 7 languages although you can download more for free here. Anyone have any more?
There's more to it but here are few things I like. - ZoneAlarm free edition - Lavasoft Ad-Aware - Spybot Search & Destroy - ClamAV antivirus - Grisoft AVG antivirus - Sysinternals tools like regmon, filemon, tcpview, and others - Vmware - Microsoft Virtual PC - any one of the hundreds of Linux Live CD-ROM distributions, download .iso files and run with vmware, or reboot and run the CD from RAM