Last week our company rolled out a massive install of Endpoint Protection 11 with Network Threat Protection.  Ever since then users with older computers running Broadcom 57XX network cards have had nothing but problems.  The biggest problem is that Internet Explorer will all of a sudden come to a halt, where it may literally take a minute to load google.com.  The problem doesn't go away until the user reboots their computer, and sometimes even that doesn't seem to fix it.  Even though Dell only has drivers for the 57XX network cards from 2007 I went to Broadcom's website and downloaded the 2011 drivers but that didn't seem to help.  The lesser problem is that users will receive the blue screen of death, this may happen maybe once or twice a day while Internet Explorer coming to a halt happens 3-5 times a day.

One thing to note is that the problem only seems to affect Internet Explorer, Firefox and Chrome don't seem to have problems, unfortunately the application that our employees spend 99% of their time in is Internet Explorer only.

So far this is what I've done to troubleshoot

1.) Update all drivers

2.) Windows update, apply all patches

3.) Disable NTP - This appears to resolve the problem but I can't accept that as an answer

4.) Update bios

We're using version 11.0.7000.975 of Enpoint Protection