To delete all of the browsing history from a computer, users must clear history for each browser they use. The most common browsers used include Internet Explorer, Mozilla Firefox and Google Chrome.

To clear the history from Mozilla Firefox, users should click the menu button in the top right-hand corner of the browser. They will then select "options" and inside this menu, choose "privacy." In the privacy menu, users should click on "clear recent history." This will allow them to choose the time frame for which they want to clear the history. After choosing the time frame, selecting "clear now" will delete all history from the browser.

To clear history from Chrome, users should select the menu button in the right-hand corner and click on "history." Inside the history menu, there will be a button that says "clear browsing data." Users can then select the type of data they want deleted and how far back they wish to delete the history.

For Internet Explorer, computer users should open the browser and click "tools" in the top right-hand corner. In this menu, they should select "Internet options" from the drop-down menu, and choose "delete." It will then prompt them to determine the data they want to delete. After making the proper selections, they can hit "delete" once more to clear all data.