NclMSBTSrv.exe or Nokia Bluetooth Microsoft Media Server is an application installed with Nokia PC Suite. According to Nokia statements, "Nokia PC Suite is a free PC software product that allows you to connect your Nokia device to a PC and access mobile content as if the device and the PC were one."
The NclMSBTSrv.exe occupy less than 3Mb RAM si 0% CPU.
Legitimate application presents no risk to your system. If you notice this process running and you do not have Nokia Suite installed on your computer, perform a full scan emergency system! Process could be virus or trojan.