Hello Manshu, I tried to follow your instructions but ran into problems. First, I copied the DellPCDiagnostic file (39KB) to the Laptop but when I clicked OPEN and OPEN as Administrator, a box opened up and I clicked RUN but nothing happened. The Diagnostics program would NOT run. So I tried to install the R248337 Driver and ran into more problems. I received an error message advising "1515 Adapter Device Not Found - The drover may not be present or could have been ejected/unplugged from the system. Aborting the install please reinsert the card and try the installer again. I checked Device Manager-->Network and it said that the adapter was Dell Wireless 1510 NW LAN mini-card so I went back to the Dell Support Website and tried to download the 1510 Driver only to discover that it was the SAME R248337 File that was rejected earlier. Your help would be appreciated again Manshu.
Thank you,
Bob