Hello,
Thank you for reporting the issue.
We need crash dump files from this folder for solve your problem.
C:\Users\<Name>\AppData\Local\Arma 3\
Can you upload somewhere in winrar package please?
When the archive is smaller than 5000k, you can attach it here. When it is bigger, please use some free sharing service and post link here.

How to find correct crashdump file:
Try to make the crash happen
Look into crashdump folder
Upload crashdump with latest date in name (crashdump is rpt + bidmp + mdmp file with same name). Please try to provide as many crashdumps as possible, it helps us investigating the problem in a big way.

Thank you.

http://feedback.arma3.com/how-to-user.html

Sorry, I dont have bidmp and mdmp files. Only rpt

Could you please try to upload your DxDiag file?
Also, have you verified your game cache?
https://support.steampowered.com/kb_article.php?ref=2037-QEUH-3335

After then, please try to run your Arma as an admin.

Thank you.

dxdiag upload.
Game cache verified.
Always crash.

How can i run arma as an admin via steam ?

i've add a screen capture of crash.

For the first time, multiplayer works. But after five minutes with the screen capture i've add.

There is unfortunately no info about a crash in your file. It looks like something is forcing your Arma to shut down. Could you please try to terminate all unnecessary programs and try again? Thank you.

I've terminated all unncessary programs.

Finaly, I observe that arma don't crash but is very long to charge the multiplayer mode. During many minutes i have no response of Arma.

I don't nnow if it help you, but I noticed that I have the same problem with teampspeak. Very long to charge.

Is it possible that you have some router issue? Could you please try the settings as described here?
https://support.steampowered.com/kb_article.php?ref=4487-YUOC-6922

I've reinstalled windows. Now it works perfectly.

Thank you for your help.

Mass-closing all resolved issues not updated in the last month.

Please PM me in BI Forums (http://forums.bistudio.com/member.php?55374-Fireball) if you feel your bug was closed in error.