My wife has a Dell laptop that is a year and half old. Integrated wireless has been running fine since the laptop was new. Out of the blue we will lose all connectivity. Network shares, printers, internet. Even rebooting doesn't solve it all the time. I thought maybe my wireless router was at fault (it was a Dlink) since the signal strength was half sitting 5 feet away from the router. I purchased a Linksys and the signal strength was much better, but still the issues continue. If I think back I MAY have added a computer and maybe cloned a DHCP server on the old router which used the laptop's information, but nothing like that is on the new router. I inadvertently did this adding my work laptop to the wireless network. Like I said though with the new router none of this even exists. I have seen Wireless Zero Config set to automatic but NOT running on the laptop sometimes. I'm at my wits end and don't know what to check for next. If anybody can help I'd really appreciate it. Thanks!