Open Task Manager → End all instances of S1-mp64-ship.exe .
# Check digital signature Get-AuthenticodeSignature -FilePath "C:\path\to\S1-mp64-ship.exe" S1-mp64-ship.exe -
The filename follows a standard naming convention used by several games in the Call of Duty : Refers to "Sledgehammer 1," identifying Sledgehammer Games as the lead developer. : Indicates the Multiplayer Open Task Manager → End all instances of S1-mp64-ship