I confirm these crashes on my Windows 7 Home Premium 64bit PC, too. I don't use Zonealarm, just Avira Antivirus Free - and I don't suspect it to cause the crashes.

The game crashes now and then, before the logo or anything appears, in the first 2 starts it freezed with 100% CPU usage in the main menu and I could only kill it manually. But after that, I got it running by changing the graphics settings with autodetect.

Now I had a crash with the same notification as the crashes that appear before the game starts - this time from within the running game, it actually generated a dump file. Here is the crashdump and my DxDiag file:

https://www.dropbox.com/s/hv0uwng4ezmkuxa/Arma%203%20Alpha%20Crashdump%20and%20DxDiag.7z?m

That should help.

Please delete that huge post and upload the files instead, there is a upload function on top of the page. This post makes it a pain to follow the thread!
Also, this was just the content of the RPT file, you should add the arma3.mdmp and arma3.bidmp to the zip file as well, if you have them.

I confirm these crashes on my Windows 7 Home Premium 64bit PC, too. I don't use Zonealarm, just Avira Antivirus Free - and I don't suspect it to cause the crashes.

The game crashes now and then, before the logo or anything appears, in the first 2 starts it freezed with 100% CPU usage in the main menu and I could only kill it manually. But after that, I got it running by changing the graphics settings with autodetect.

Now I had a crash with the same notification as the crashes that appear before the game starts - this time from within the running game, it actually generated a dump file. Here is the crashdump and my DxDiag file:

https://www.dropbox.com/s/hv0uwng4ezmkuxa/Arma%203%20Alpha%20Crashdump%20and%20DxDiag.7z?m

That should help.

Edit:
Uploaded the file here as well, to make sure it doesn't get lost one day. Didn't see the upload function in the first place. :)

2nd Edit:
To complete my info about the crash, this is what the Windows notification says:

Problemsignatur:

  Problemereignisname:	APPCRASH
  Anwendungsname:	arma3.exe
  Anwendungsversion:	0.5.102.571
  Anwendungszeitstempel:	512deb6a
  Fehlermodulname:	ntdll.dll
  Fehlermodulversion:	6.1.7601.17725
  Fehlermodulzeitstempel:	4ec49b8f
  Ausnahmecode:	c0000005
  Ausnahmeoffset:	00039363
  Betriebsystemversion:	6.1.7601.2.1.0.768.3
  Gebietsschema-ID:	1031
  Zusatzinformation 1:	0a9e
  Zusatzinformation 2:	0a9e372d3b4ad19135b953a78882e789
  Zusatzinformation 3:	0a9e
  Zusatzinformation 4:	0a9e372d3b4ad19135b953a78882e789

I found it interesting that it names ntdll.dll as error module, could be a clue, maybe. ^^