RE: Intel Wireless Dual Band AC 7260 issue
What is the exact system model? What is the current OS installed on the system? When did the issue start?
Check this Intel thread - http://intel.ly/2eadry3
Also, this article explains all the changes required if system is on Win 10 - http://bit.ly/2eyUioy
Also, please click my DELL-username and write me a private conversation with the service tag and your contact details(Name and Email) for case records.
Let us know if you have any other queries.