Hi kondorpa,
Since you have just purchased the laptop, we would recommend you to get in contact with Lenovo* as the first resource and update the wireless card drivers.
You may want to use the Retail version drivers we offer, they can be downloaded from here:
You can download the "Wireless_15.1.0_s32.exe" version, as this one comes with all the software.
http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=21143&ProdId=3227&lang=eng&OSVersion=Windows%207%20(64-bit)*&DownloadType=
If the issue persists, we would suggest contacting Lenovo* for support.
Cheers!