One of the most critical applications for your PC is a good antivirus program.Also,the latest viruses are more sophisticated and aggressive than ever. Thankfully, with anti-virus software, you can confidently keep your data safe and your computer completely free of infection.
Unlike antivirus trailwares such as MCAfee or Symantec, it's absolutely free for personal and home use.Also it won't slow down your PC by taking too much RAM or system resources. Despite its lean build, it protects your computer as the bigger programs do. It offers live virus protection to stop your machine from being infected in the first place, virus scanning and virus killing, and various protections against e-mail viruses, Web-borne viruses, and other threats.
Download Avast Anti-Virus
Ad-Aware 2007 Free
If you haven't used this before, consider it a must-have.This longtime favorite spyware killer recently underwent a upgrade. After all, not only does it kill spyware, but it's free as well.
It's exceptionally easy to use, and lets you customize spyware scans as well as schedule them. When the program reports what it finds, you can tell it to kill the potential infections, put them into quarantine, or ignore them. The new interface is much slicker-looking and easier to use than earlier versions.
Download Ad-Aware 2007 Free
Spyware is so hard to detect that you should use more than one antispyware app. Windows Defender is a very good choice for a second layer of security. It's free, it does a nice job of finding and killing spyware, and, unlike Ad-Aware, it offers real-time protection.
It also has some extras, such as tools for monitoring all the software and processes currently running on your PC, and for stopping programs from running on startup if you decide you don't need them.
Download Windows Defender