This is a collection of great links to freeware to keep your computer in great shape.
Disk Cleanup Tools
CCleaner is a freeware system optimization and privacy 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. But the best part is that it's fast (normally taking less that a second to run) and contains NO Spyware or Adware! :)
EasyCleaner is a small program which searches the Windows registry for entries that are pointing nowhere. EasyCleaner also lets you delete all kinds of unnecessary files such as temps and backups. You can search for duplicate files and you can view some interesting info about your disk space usage! You are also able to manage startup programs, invalid shortcuts and add/remove software list.
Free Internet Window Washer is a free internet tracks eraser and privacy cleaner software.As you work on your computer and browse the Internet, you leave behind traces of your activity.The Windows built-in functions will not protect you, most of the tracks can not be erased with them. Therefore, anyone else can see what you have been doing on your computer. Furthermore, much of your activity information takes up valuable disk space, and recovering this space can be very beneficial.
Ad/Spyware Removal Tools
Ad-Aware Personal provides advanced protection from known data-mining, aggressive advertising, Trojans, dialers, malware, browser hijackers, and tracking components. This software is downloadable free of charge.
Spybot - Search & Destroy can detect and remove spyware of different kinds from your computer. Spyware is a relatively new kind of threat that common anti-virus applications do not yet cover. If you see new toolbars in your Internet Explorer that you didn't intentionally install, if your browser crashes, or if you browser start page has changed without your knowing, you most probably have spyware. But even if you don't see anything, you may be infected, because more and more spyware is emerging that is silently tracking your surfing behaviour to create a marketing profile of you that will be sold to advertisement companies. Spybot-S&D is free, so there's no harm in trying to see if something snooped into your computer, too :)