My laptop is dell inspiron 15  3542 and I am using windows 7 64 bit. Today I was trying to install a bluetooth software.  I downloaded the following software from the site of dell ,Network_Driver_NT9P6_WN_6.30.223.99_A00 , During the process of installation, a dialogue box appeared asking to activate bluetooth using wireless switch. I don't know which is the wireless switch in my laptop. Anybody please help me. Thank you.