This is what worked for me:
Download the following DLLs:
- clr.dll
- mscordacwks.dll
- SOS.dll
from this folder on the machine that generated the dump:
C:\Windows\Microsoft.NET\Framework64\v4.0.30319
Run the following command. The path to SOS.DLL should be without quotes, unescaped path delimiters:
.load path to downloaded SOS.DLL
I think a new WinDbg session is required for this to work.