A United Boeing 767-300, registration N677UA performing flight UA-61 from Newark,NJ to Honolulu,HI (USA) with 201 people on board, was accelerating for takeoff from Newark's runway 04L when the crew rejected takeoff at high speed (about 140 knots over ground). The aircraft slowed safely, vacated the runway and stopped on an adjacent taxiway for a check and cooling of the hot brakes by emergency services. The crew reported an issue with a cockpit window as cause of the rejected takeoff. The airport reported the passengers disembarked via stairs onto the taxiway and were bussed to the terminal, the aircraft was subsequently towed to the apron. The FAA reported the crew reported an indication of a possible mechanical issue as cause of the rejected takeoff. The airline reported the crew rejected takeoff due to an issue with a flight deck window, a minor technical malfunction.