The x64 debugger version is for running on a 64-bit machine and will debug x86 and x64 dumps.
Create a desktop shortcut for WinDbg.exe. (Right click the .exe and chose Send to Desktop). Right click on the shortcut then click Properties.
On the Shortcut tab, add the following to Target but substitute your location for the symbol files. (bold) The one shown is the location on MY D: drive. Click apply, then OK.
-y SRV*
d:\ms-websymbols*
http://msdl.microsoft.com/download/symbols
The
entire Target line should look like this:
"C:\Program Files\Debugging Tools for Windows (x64)\windbg.exe" -y SRV*
d:\ms-websymbols*
http://msdl.microsoft.com/download/symbols
Double clicking on a dump file will not work since the debugger doesn't know where the symbols are by default. Use the desktop shortcut to open the debugger then open the dump file. The default location of the dump files is C:\Windows\Minidump but you can choose from where to load the dump. After the dump is open, debugger will start downloading symbol files. Let it load--You'll see the status at the bottom of the screen. After the first time, it will download only those that are needed or updated.
Debug away!