Adaware
With its ability to scan your RAM, registry, hard drives, and external storage devices for known data-mining, advertising, and tracking components, Ad-aware can easily clean out your system, allowing you to maintain a higher degree of privacy while you surf the Web.
Spybot - Search & Destroy
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.
ZoneAlarm
ZoneAlarm is designed to protect your DSL or cable-connected PC from hackers. This program includes four interlocking security services: a firewall, an application control, an Internet lock, and zones.
Avast Antivirus
Avast Home Edition is free antivirus software for home, non-commercial use. It scans for viruses, worms, and Trojan horses. Avast scans on demand - with skinnable simple interface, during boot time, and on access. It protects e-mail, ICQ, mIRC, Kazaa.
Trend Micro House call
Ease your mind and scan your PC for viruses NOW!
Windows Update
Windows Update is the online extension of Windows that helps you stay up to date with updates from Microsoft.
Winsock XP Fix
WinSock XP Fix offers a last resort if your Internet connectivity has been corrupted due to invalid or removed registry entries. It can often cure the problem of lost connections after the removal of Adware components or improper uninstall of firewall applications or other tools that modify the XP network and Winsock settings.