On the other hand, to clear a long time period download history, firstly open the Chrome Menu. Now, click History, and Recent Tabs/History/Clear Browsing Data and uncheck the download history box. You can choose the amount of download history you wish to delete from the drop-down menu. Finally, click browsing data to clear all download history. For assistance, search and dial the Google chrome helpline number at the Contactforhelp web-directory.