The most common cause of the condition you have described is the browser being used. To make sure that browser being used by your friend is not causing this issue, I recommend that you advise your friend to optimize his or her browser settings. To learn how to optimize your browser's settings in Internet Explorer, please check out the Solution by MSFT Roopa S “How to optimize Internet Explorer browser” by accessing the link below
http://windowslivehelp.com/solutions/accounts/archive/2009/03/03/How-to-optimize-Internet-Explorer-browser.aspx
Note: If you are using a browser other than Internet Explorer, see the documentation for that browser.