Personally, I am all over the place...nasty places
and not so nice places
and wonderful places. I'm armed to the ear lobes; do almost hourly maintenance; run all sorts of things in the back ground and, before and after certain functions, such as installs.
If it involves a product that I am testing and it acts up, out it goes; then a clean up, then a reinstall, then a clean up, then further testing...over and over and over again.
The nasty sites are the so-called "undergroung" ones
where the lions and tigers live, and great big loathsome spiders...don't like spiders
Unfortunately, one takes his computer's life into his own hands under those conditions, and dealing with malware and viri are part of the process, part of the challenge of building a pretty impervious system. That is where PC-cillin has earned its keep, as far as my system is concerned.
Windows XP has been a big improvement, and as said earlier by many, those updates are critical, especially any for Windows Defender and the .net Messenger service. I avoid anything to do with Outlook as it seems to be the portal of choice for many nasty folks. I use Netscape to avoid IExplorer vulnerabilities. I use Copernic for my search engine, mostly, as MSN and google appear to be on the cusp of being challenged.
If I have any weaknesses it is due to the software I use, not the due diligence I adhere to, to protect my system.
This knowledge is then imparted to those whose computers" systems, I repair. If you are going to own a pet, it is your duty to care for it, like one of the family.
I believe that knowledge is power, and education is mandatory when operating a computer, and especially if you are going to visit the internet. So, I also read copiously, the various articles, etc. on some of those underground sites. Astalavista is one that I recomment. Asta used to be one of the less then communicative sites once upon a time. Based in England, they got religion and now are in the forefront of exposing the seamier side of the net. They in turn refer you to other like sites, that educate and inform.
I am on the computer for up to 12 hours a day straight, researching and testing. This has been greatly reduced over the years.
I am also an amateur genealogist, and share my knowledge with a great many who are doing the same.