wireless device does not have a valid ip config - windows 7

lap top had been working with wireless acess with no issues.  2 weeks ago, truned on laptop and could not access internet.  troubleshooting came back with "wireless adapter does not have a valid IP configuration.  2nd and 3rd laptop, ipad and iphones have no issues connecting to internet.   Have been on dozens of sites explaining how to fix issue, and none of them have worked.  Also was on with Microsoft tech support and they did not help.    h\Has anyone experienced this issue and was able to resolve it.  any help would be greatly appreciated.