Is there a way to block certain websites? ?

You can block websites via software/hardware, or by simply editing a small file that is stored on your PC called the hosts file.

This files location is :-

C:\WINDOWS\system32\drivers\etc

You'll need to open it with Notepad or Wordpad or any other text editor.

If you for example edit the file to something like this :-

------8<----------

#blocked sites

127.0.0.1 localhost

127.0.0.1 myspace.com

127.0.0.1 www.myspace.com

------8<----------

...

This will re-direct myspace.com to your localhost/your PC or why not re-direct it to yahoo answers ;)

------8<----------

#blocked sites

127.0.0.1 localhost

answers.yahoo.com myspace.com

answers.yahoo.com www.myspace.com

------8<----------

If you have any internet security software, you can add it to the blocked list. If you have a cable modem router, you can usually block it there.