Clean Registry
Software to backup, clean and compress registry. Make your computer run faster and with less errors or system halts. What is the registry? The registry is where your computer stores information about the configuration of your system and your programs so that the operating system (Windows) can... Defragmenting a system or registry is when the system removes blank bytes of data and consolidates the remaining information so that there are no blank memory pieces within it. ... If your registry becomes infected with a virus or you have lost keys, it may require you to reinstall Windows.
http://www.winenhance.com/crdemo.exe - 903Kb - Download - Screenshot

AntiSpye
There are lot of software that fights against viruses and spy modules which are doing attacks to your PC from Internet. However, there are some times when spy may stand on your side of screen behind you. Sometimes it is safe, but sometimes you can work with important information that you do not... Your screen will be hidden with blank window, screensaver or with the screenshot that you could make earlier. ... Just move the mouse pointer to one of the screen corners and viola! ... No mouse clicks, no fingers configurations to press simultaneous key combination.
http://www.zerge.com/download/antispye.zip - 358Kb - Download - Screenshot

WinGuard Pro
Password protect your programs, files and folders for free! Users can add password protection to any Windows program. Two types of file and folder protection, including encryption, provides you with all-in-one solution for protecting your computer from unarthorized access. ... > Screen blank: You can have the screen blank in emergencies, this prevents any use of the computer, and blacks out the screen only leaving a password box to access the entire system. ... > Extra Locking: Did will tell you about Extra Locking?
http://wgp.swmirror.com/wgpro.exe - 592Kb - Download - Screenshot

Abbackup
With Abbackup you can easily backup large amounts of files, photos and music to CD-R and DVD-R. Your data is kept safe against breaking hard drives, disasters and viruses without having to spend hours figuring out how the program works. Even if you have tens or hundreds of Gigabytes of files,... Because you don't have the time to learn everything about backups, we've kept it simple: Just choose your files and go. ... Each backup follows the same procedure: Click the backup button, insert a blank disk, and mark the disk when the backup is finished.
http://www.abbackup.com/download/Abbackup_setup.exe - 1Mb - Download - Screenshot