In Internet Explorer, click settings on the tool bar. (It looks like a little gear.) Choose Internet Options. Then click on the Privacy tab and make sure the “Turn on Pop-up Blocker” box is unchecked.
In Chrome, click on the menu. (It looks like three little bars in the upper right hand corner.) Choose settings. This will open up a new tab. Scroll down to the bottom and click on “Show advanced settings”. Under Privacy, you will click the content settings button and in the window that pops up (no irony there), scroll down to “pop-ups” and make sure allow all sites is selected.
Be sure to save any changes you make.