iISystem Wiper
Allows you to delete information that windows stores about what you do on your computer. Deletes history, cookies, temporary files, and more. Clears files for Internet Explorer, AOL, Netscape, and many other programs. Includes plugins for over 50 applications and you can create your own plugins with the plugin editor. More free tools on the site.
http://iisoftware.net
RegCompactor
Over time the registry becomes larger as new programs are installed, used and removed. The registry can grow but it can never shrink back due to its design. This is because when you add some data into the registry it becomes larger, but when you remove this data the registry will not shrink back to it''''''''''''''''s previous size. Why? When a registry entry is removed, that entry is simply marked as blank but remains in place, introducing a gap into the registry. This way the registry becomes more and more fragmented over time.
http://www.elrise.com/registrycompactor.htm
Winspy
With @WinSpy, You can find out what the others have done on your computer , including what web sites they have been, what text, images, movies they have seen. and also what files they opened/saved, what kind of search they have done and what they ran at the start menu. Double click the displayed item will directly open or link to the file or the URLs stored on your computer.
http://www.acesoft.net/winspy/
Installspy
A program to monitor the filesystem, registry, processes, and shell for changes.
http://www.mjleaver.com/Software/software.htm
SpywareBlaster
Spyware, adware, browser hijackers, and dialers are some of the fastest-growing threats on the Internet today.
By simply browsing to a web page, you could find your computer to be the brand-new host of one of these unwanted fiends! The most important step you can take is to secure your system. And SpywareBlaster is the most powerful protection program available. Prevent the installation of ActiveX-based spyware, adware, browser hijackers, dialers, and other potentially unwanted pests. Block spyware/tracking cookies in Internet Explorer and Mozilla/Firefox. Restrict the actions of potentially dangerous sites in Internet Explorer. SpywareBlaster can help keep your system spyware-free and secure, without interfering with the "good side" of the web. And unlike other programs, SpywareBlaster does not have to remain running in the background.
http://www.wilderssecurity.net/spywareblaster.html
WinPatrol
WinPatrol uses a heuristic approach to detecting attacks and violations of your computing space. Traditional security programs depend on signature or reference files which are like the guy who holds the shovel behind the horses in a parade. WinPatrol takes a snapshot of your critical system resources and alerts you to any changes that occur without your knowledge.
http://www.winpatrol.com
Ad-aware
Ad-aware is THE award winning, multi-trackware detection and removal utility (designed for Windows 98 / 98SE / ME / NT40 / 2000 / XP Home / XP Pro) that will comprehensively scan your memory, registry, hard, removable and optical drives for known Datamining, aggressive advertising, Parasites, Scumware, Keyloggers, ed traditional Trojans, Dialers, Malware, Browser hijackers, and tracking components.
http://lavasoft.element5.com
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