yes certain anti-virus software does abort connections with harmful sites but some anti-virus software does not so it leaves you open to worms and trojans.
Anything they want
proxies or zproxies or proxie sites or dailymotion
BinarySwitch Eclipse offers a simple browser-independent way to block sites.
A computer virus can get into your computer if you go onto a harmful website, EG some porn sites
You can block gambling sites by installing a web filter on your computer. Alternatively, you can set up parental control to block these websites on certain types of Internet security software.
A smartscreen filter can protect one from accessing sites which may be phishing or harmful to ones computer. Using one comes with the protection knowing that it will prompt or disable a website. Disadvantages are that it often will block sites which one regularly uses, even though they are not malicious.
In the Accounts section of System Preferences you can enable Parental Controls which has the options to automatically limit access to "adult" websites and a customized list of websites that you want to block.
Some antivirus programs automatically block sites if the program detects it as a risk. If one's program doesn't have this feature one can block a site, such as Chaka T, by going into the settings and manually adding the site to the "blocked" list.
You don't go there. School computers block some sites and you are not suppose to be on those sites. When I find students on sites that are not part of the subject/curriculum I take them off the computer.
There are several ways one can block their computer from visiting dirty chat sites. Perhaps most popular would be parental control programs which block website with certain content ratings.
Depending on your computer you can use parental controls with Microsoft Windows to block certain sites. You can also use the Windows Firewall to disallow certain outbound connections. Some anti viruses also allow you to blacklist sites.
A web filter is a filter which can be placed upon a personal or work computer, and can be used to monitor and block websites. Some of these sites may actually contain harmful viruses via pop-ups or side-bar advertisements. Having this filter in place can block unwanted content.