When searching online and visiting different sites, there is likely a lot of content you would rather not see, whether it is inappropriate or dangerous to the safety of your computer. Search engines, like Yahoo!, Google or Bing, all have security settings you can use to specifically block the unwanted search results easily. Blocking sites you don't want to load, are easily restricted through the Windows controls. The instructions here mention using Vista, but you can use the steps for any operating system.
Go to Google's homepage and sign into your account by clicking on the sign-in link on the top right of the page.
Select the Settings links on the top right side of the page and choose the Search Settings option in the drop down menu.
Scroll down the page until you see the Safe Search options.
Choose the level of strictness you want by clicking on that option. You can select moderate safety or strict safety to block the offensive results from your search.
Click the Save Preferences button on the bottom of the page to retain the changes you made.
Go to the Start menu on your toolbar and open up the Control Panel folder and click on Set Up Parental Controls under User Accounts.
Enter your administrative user information and password if you are asked for it.
Select the "On" option under Parental Controls and open the Web Filter.
Open the Block option and select the option to edit the list of blocked and allowed content.
Enter each of the URLs of the specific sites you want to block. Select block after entering each URL and click save when you are finished.
You can find software online that restrict sites that other users have flagged as offensive, so you don’t even need to add the URL to be blocked.
Keep your online account and OS passwords away from your children if you are blocking the sites and searches for parental controls.