Hello, 

You need to add the DVR IP to the compatibility view list in IE11. First lets delete the webrec on y our PC by going to the program files x86 folder and deleting a folder labeled "webrec, then Go to the DVRs IP address then before logging in to the unit go to   Tools>Compatibility view settings and add the DVR's IP address. Also you need to make sure your IE11 settings are set correctly to make the computer download the actives controller. Make sure you go to the security tab and custom level. Make sure the option download unsigned activeX controls is select as prompt. 

Thanks