If you are registering for a service that has a legitimate need for your Social Security number, provide the information through traditional mail. Check out who you do business with on the internet, just as you would if you were trying to get your lawn mower repaired, looking for someone to do your taxes, etc. Some web sites have set up systems for conducting secure credit card transactions by encrypting your information when you order merchandise. Remember rule 4. This applies both to other web sites and e-mail.
Most computer viruses come in the form of executable files.
Otherwise your computer may end up being a dumping ground for junk-mail. If this is unsuccessful, you may need to change your service provider. Then, let only those you wish to communicate with know your new internet address. The internet is no exception. Children and teenagers may be exposed to unacceptable materials featuring sexual, violent or other objectionable subjects.