Ever wondered, after having two(or more) anit-spyware's and one(or more) anti-virus installed and safe guarding your system, how is it, that your system still gets infected? Are the anti-spywares not good enough? Or is it that spywares have become more ferocious and intelligent?
Hacker's have always found a way around software, they always found a way of making you do what they want. Either with their social skills, which are way much safer if not better than at cracking software. It really doesn't matter how many anti-spywares you have installed, how many anti-virus software you have installed, they always find a way to go around, if not bring down, your systems defenses.
Turn around engineering is one of the best tools hackers have against any anti-spyware/anti-virus, no matter how many web reviews boast about these anti-malware software, they are always available to hackers, who rip open the code, study how the anti-spyware or the anti-virus works. Thus laying down blueprints for their next work of art. Unlike anti-malware software companies, hackers on the other hand have had an upper hand almost always, once a new really good anti-spyware or anti-malware is out, they get their hands on it and study it and make more dangerous viruses and spywares that now have the capability of working around these anti-malwares. By the time you get your hands on the anti-malware or anti-spyware it's already been compromised.
Although not as smooth as their hacking skills, hackers as always, first try the easy way out in to your computers using their social skills, it's a surprise some of them even have them. If a hacker can persuade you to click a link, open an email; press a button by means of simple text, video, graphics communication, which display offers, attachments that look so important, other interesting free offers; that's all they need. Once the attachment is downloaded or you have clicked on the link out of curiosity, and you are on your way to the website, the website silently tries to download malware on the fly. These malwares once into your system disable your anti-spyware. It might look as if the software is running, but it has just been sent to comatose.
Most vulnerable and marked computers on this side of the universe are the residential ones, with high speed internet connections. If you have Tech savvy teenagers at home, the one's yielding the light sabers, not worried to click on links and "discover" new software if they know they are getting something for nothing, using Peer-to-Peer sharing software, bit torrents, frequently downloading cracks from underground websites and using some social networking software, all a Mecca for the bad guys to gain entry into your computers, puts your, singled out personal computer, in the front lines without any ammo.
The average business computer is in a controlled environment and will relatively have restricted access to the internet as well as the local network. These computers are normally watched by IT administrators or bosses to monitor the usage. None the less the human factor still plays at large, and these computers are still prone to attacks.
The average residential network is almost the same as the business one, with the major difference being that there is someone to watch over the usage in the business domain and involve access constraints and spend resources to keep their business going. The residential network is vast, never watched, access is only limited to what you want it to limit, and by large is a completely an off the cuff network. Hackers understand this and almost always will attack the weakest.
You might have taken digital measures to safeguard your computers, and may be still getting infected. This is because you might have aliveware problem, someone at home must be engaged in downloading questionable software and illegal mp3's from programs such as kazaa. He/she might be visiting websites that silently exploit your anti-malwares.
The only way is maybe to question them and ask them to stop. A student, who is still studying Information Technology in school, can have a look at the software you have installed and evaluate your security.