Kambiz44,   Try reading this thread... Power Save Polling (PSP) causes connection issues with some access points   It states... Go to...  Control Panel\All Control Panel Items\Power Options\Create a Power Plan  Select High performance.  Start, control panel, device manager. Click on Network and then right click on your wireless adapter, left click properties, power management. Uncheck the box, allow computer to turn off this device to save power.     Rick
Hi there, I really feel like flinging my ultrabook out the window; I hope someone can help me. Everytime I close the lid to my ultrabook and then go back to use the laptop and open the lid, the internet connection is gone (not connected). To get connected again, I have to open the network and sharing centre and click on the red x to diagnose and repair the connection in order to use the internet again. Is this normal? is that what everyone else has to do?  This is nuts.  If anyone can help me out with that, you will be a god! Thanks.
Dell Ultrabook and Wireless Internet Connection