We tried reaching you on a private message asking for the Service Tag number to ascertain the warranty but did not receive a response. Please feel free to reply to the private message whenever you are available.

@DELL-Cares​  So if the warranty expired a month ago, you will not post a simple fix here?

@Maverickmax​ 

I had the problem or something similar.

What I did was get the Killer 1650i s/w from intel, using Revo (I recall) removed the Killer s/w and then reinstalled, problem was fixed...

I might have used Device Manager to Uninstall the driver as well, not sure which but it did involve uninstalling before the install.

@DroZ3  Always include exact PC model and version of Windows in your posts.

Do you really need/want any of the Killer stuff?  It -mostly- just slows down Ethernet and WiFi performance, and collects data.  Every time Intel updates the software, there are new/more problems. The last Killer update pushed by Windows Update killed upload speed. 

You only need the Killer driver (listed in Device Manager) and not the entire Performance Suite. I'd open Start>Run>services.msc and change the Startup type for each Killer service to Disabled. Then open Task Manager and if any Killer apps are listed on the Startup tab, disable them there too. Then just reboot PC.

FWIW, Dell only warranties software for first 30 days and hardware for 1 year from invoice date (not delivery date), unless you purchase an extended hardware plan....