Here are some useful software on the Internet that are freely available. They will definitely meet your needs on a comparable level as commercial software.
AVG Anti Virus
(Visit their website)
AVG Free offers very good protection against viruses and spyware. As a bonus, its real-time LinkScanner technology keeps you from clicking search links to dangerous sites. It's an excellent choice if you need free protection against both viruses and spyware. AVG is free for home use.
K9 Web Protection (Visit their website)
Blue CoatŪ K9 Web Protection is a content filtering solution for your home computer. It allows you to protect your children from websites with objectionable content. Its free and easy to use. Protect your children today!
Smart Defrag (Visit their website)
What's the primary cause of slow/unstable PC performance? It’s disk fragmentation. This freeware will give you a complete diagnosis of your current hard drives, then defragment and speed up disk performance in minutes.
Malwarebytes Anti Malware
(Visit their website)
Malicious software can infiltrate your computer without your permission as you surf the Internet. Get rid of them with Malwarebytes Anti Malware! It is without a doubt the most advanced anti-malware application to date. The user interface is clean, simple and easy to navigate.
CCleaner
(Visit their website)
CCleaner is a freeware system optimization, privacy and cleaning 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. Additionally it contains a fully featured registry cleaner. But the best part is that it's fast (normally taking less than a second to run)
