bcmwltry.exe is BroadCom's Wireless Network Tray Applet. It runs if you are on a wireless (802.11a/b/g) network. It is located in "C:\WINDOWS\SYSTEM\" on Windows 95/98/ME, "C:\WINNT\SYSTEM32\" on Windows NT/2000 and "C:\WINDOWS\SYSTEM32\" on Windows XP.
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