Running out of memory: Apple os

I need to delete some files in my computer memory but I don't know which one is safe to delete or not. I posted the screenshot below. Can someone please help me on deleting unwanted files? Thanks.
WindowsServer (80)
Parent Process: launchd (1)
Process Group: WindowsServer (80)
% CPU : 5.29
User: _windowsserver (88)
Recent hangs: 0
Memory | Statistics
Threads: 7
Ports: 432
CPU Time: 52:45.63
Context Switches: 15268711
Faults:
Page Ins: 4177
Mach Messages in: 38730935
Mach Messages out: 89160733
Mach System Calls: 70668541
Unix System Calls: 21023642
