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SQL SERVER Disconnected

i have trial version of sql server 2014 in my windows 10 PC. This pc is connected by so many (30) users. when users execute query, they got disconnected & Error came as below
Msg 121, Level 20, State 0, Line 0
A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - The semaphore timeout period has expired.)

& also they can not able to ping server near abt 5 minutes. ( i have used another system but same problem)
is it query related?