That all depends on what you're using. If you are only using internet Explorer, this article explains how to blocks sites in IE:
http://www.ehow.com/how_2178367_block-website-internet-explorer.html
If you are using Firefox, you have to use an external program. Programs like ZoneAlarm or other firewalls can do this, or you can buy an internet filter program like Net Nanny that's made for blocking sites. Of course, these programs work for all internet browsers, so they are probably the way to go.
you mean how to block stuff then get net nanny
They block websites that would not be beneficial to their educational curriculum.
Schools block proxy websites because they do not want students to go on uneducational websites
http://www.411-registry-repair.com/block-windows-hotkeys
There are a few websites where one could download a Windows XP sound driver. Three examples are the websites XPDrivers, Blitware, and OfficialDrivers.
Many different websites can be blocked. Often employers will block all websites that are not pertinent to the employees job. Parents often block websites that contain pornography and violence.
you can download software
200%
YES
With the password. If anybody know how to hack it though email me. rabbitx369@gmail.com with cock-block in the subject line.
A XP codec pack can be found on such websites such as CNet and FreeCodecs. These site have links to the codecs and also provide information on other types of codecs that may run the extension you have your media formatted in.
You cannot block websites via Google Chrome internal's browsers. You can only do it by 3rd party apps in web store.