Instructions to manually set a computer clock are available on the Microsoft and Apple official websites, as of 2015. Users can find the correct instructions by utilizing the search functions of each site.
Mac users visit Apple.com, click the word Support in the top menu and then click Mac in the list of options. The magnifying glass in the top right-hand corner of the page yields a search box. Typing “set clock” in the search box and pressing the Return key on the keyboard brings a list of topics. Users click the appropriate link in the search results, and the instructions appear in the browser window.
Windows users visit Microsoft.com, type “set clock” in the search dialog box and hit the Enter key. On the search results page, they click the instruction link for the appropriate operating system.