Yesterday morning I had a BSOD in Windows 7 x64 but when I looked for the dump or minidump files, neither was there (the last one was precisely a month ago yesterday, and did create a MEMORY.DMP file) ...

If you're talking about the files in \windows\minidump ... they contain information recorded at the time of an OS crash ("blue screen of death"). The stack of the current thread, some minimal info ...

My Windows PC doesn't crash as often as it did in the Windows 7 era, and I haven't seen any of those dreaded blue screen of death (BSOD) messages, the one thing you could always count on Windows to ...