Hi. My name is***** you for your question and the opportunity to assist.
Try to see if you can turn it off this way.
Click Start (the icon in the lower left corner)
click Network & Internet
click Airplane Mode
You should be able to move the little slider to the off position.
Do you have a phone number I can reach you at?
I've been looking around and this issue is pretty common.
I have no idea if this will work but if you upgraded from Win 7 to Win 10 it's possible Windows 8.1 wireless drivers might make a difference.
From what I've seen XPS desktops are using a Dell Wireless 1703 card.
You can get the 8.1 drivers here: http://www.dell.com/support/home/us/en/19/Drivers/DriversDetails?driverId=P84MY
This is for the XPS 8700
You may have already seen this but in case you haven't......https://www.reddit.com/r/Windows10/comments/3fu666/windows_10_turned_on_airplane_mode_and_wont_turn/
Someone also claimed that going in to Device Manager and under Human Interface Devices disabling HID-Compliant wireless radio controls fixed the problem for them.