The DxDiag file is provided within the 'Attached Files' section, as well as multiple screenshots of the aforementioned windows.
Common background programs include - TeamSpeak 3, Skype, cmd.exe, Google Chrome, and Steam.
Steam launch options for DayZ are - '-cpuCount=4 -exThreads=3 -maxMem=7168 -maxVram=2048 -nosplash -noPause'.