If the game crashes or freezes when running on Windows, you can help us to debug the problem. If you have Visual C++ installed then you can use its debugger. Otherwise you should try these instructions to run the free WinDbg tool:

 * Install the [http://msdn.microsoft.com/en-us/windows/hardware/gg463009/ Debugging Tools for Windows]. (In the Windows SDK installer, you can disable everything except the first "Debugging Tools for Windows" option.)
 * Run '''!WinDbg''' from the Start menu (in "Debugging Tools for Windows", or if you are on 64-bit Windows then "Debugging Tools for Windows (x64)").
 * Set "File > "Image File Path" to `X:\path\to\0ad\binaries\system`.
 * Set "File > "Source File Path" to `X:\path\to\0ad`.
 * Set "File" > "Symbol File Path" to `srv*X:\symbols*https://msdl.microsoft.com/download/symbols` per [https://docs.microsoft.com/en-us/windows/win32/dxtecharts/debugging-with-symbols#using-the-microsoft-symbol-server Debugging With Symbols].
 * "File" menu -> "Open Executable".
 * Browse to the location where you installed the game, and open pyrogenesis.exe in the binaries\system folder.
 * If you want to debug the Atlas editor, put "-editor" in the "Arguments" box before clicking "Open".
 * If it asks to "Save information for workspace", say yes.
 * Enter the following commands: (the last step may take several minutes the first time you do this - wait until the "*BUSY*" prompt goes away)
{{{
.symfix
.reload /f
}}}
 * "Debug" menu -> "Go".
 * If you are on '''64-bit''' Windows: The game may not start immediately, and the !WinDbg window may say
{{{
(690.8c8): WOW64 breakpoint - code 4000001f (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
ntdll32!LdrpDoDebuggerBreak+0x2c:
770b0f3b cc              int     3
0:000:x86>
}}}
 In that case you should do "Debug" menu -> "Go" a second time, and then the game should start up.
 * You may want to switch the game from fullscreen to windowed mode (press alt+enter while running it) to make it easier to see to the !WinDbg window.
 * When the game has failed (frozen or brought up an error message), switch to the !WinDbg window and "Debug" -> "Break".
 * If you are on '''64-bit''' Windows: Enter the command
{{{
!wow64exts.sw
}}}
 * Enter the command:
{{{
~* kp
}}}
 * If it shows a "*BUSY*" prompt, wait for that to go away (might take several minutes the first time you do this).
 * Copy-and-paste the output into some kind of pastebin service like [http://paste.pocoo.org/ this] and post the link to it.