Alan has been having issues visiting a website on his computer, but his wife can do it on hers. Rich says that it could be that if Dave had installed a program recently, it could be interfering with his web browser. Another possibility is that Dave's Java isn't updated. He should try updating that. Also, Dave should turn off all of his browser extensions. If he can access the site after that, then he'll know that an extension is the culprit. To find out which extension is causing it, he can just go in and turn each extension on one by one until the site doesn't work again.