If your hard drive has less than 25GB of free space, Windows 7 won’t create crash dump files for help diagnose crash issues. However, you can force it to regardless of free space with this new Registry entry:
Hive: HKEY_LOCAL_MACHINE
Key: SYSTEM\CurrentControlSet\Control\CrashControl
DWORD Name: AlwaysKeepMemoryDump
DWORD Value: 1
You can then find the memory.dmp file in the Windows directory.
