I'd run thru and review those links posted and see if anything there will help.
What is the Mfr and model of the ISP modem and Main host router?
PC 3rd Party Security Software Configurations- Turn off all anti virus and firewall programs on PC while testing. 3rd party firewalls are not generally needed when using routers as they are effective on blocking malicious inbound traffic.
PC Web Browser ConfigurationsWhat browser are you using?
Try Opera or FF? If IE 8, 9, 10 or 11, set compatibility mode and test again.
Disable any security browser Add-ons like No Script and Ad-Block or configure them to allow All Pages when connected to the router.
Clear all browser caches.Be sure to log into the Admin account on the router.
Try turning off these features in Chrome: Top right corner, little bars for options > Settings > Settings (on left) > Show advanced settings.
Uncheck these:Use a web service to help resolve navigation errors
Use a prediction service to help complete searches and URLs typed in the address bar
Predict network actions to improve page load performance
Enable phishing and malware protection
Also...
http://www.ghacks.net/2015/04/15/chrome-42-blocks-java-silverlight-other-plugins-by-default-now/mydlink.com Supported BrowsersInternet Explorer 7 or higher (32-bit) - Add mydlink.com to the "Compatibility View" exceptions list.
Firefox 12 or higher
Chrome 20 or higher
Safari 6 or higher (Mac OS only)
http://forums.dlink.com/index.php?topic=62395.0
IE 11 and DLINK Active X Install A quick workaround is to enable developer mode (F12), go to the button icon on the right (Emulation) and select "Internet Explorer 10" instead of "Edge" on Document Mode.