To disable the access to clipboard or allow it without being prompted:
1) Open the "Tools" menu
2) Click "Internet Options"
3) Go to the "Security" tab, make sure "Internet" is selected and click the "Custom Level" box.
4) Scroll down to the "Scripting" section and under "Allow Programatic Clipboard Access" set it to DISABLE or ENABLE (which means allowing access without being prompted), as desired, and click OK > Yes > OK.