'A hard fault (also known as a page fault) occurs when the page of the referenced address is no longer in physical memory and has been swapped out or is available from a backing file on disk. It is not an error. However, a high number of hard faults may explain the slow response time of an application if it must continually read data back from disk rather than from physical memory.'
Um, Spartacus has just about said it all. As my RAM was regulated by Windows (I've just changed this), I'm wondering why Windows is having so much difficulty swapping data back and forth. Indeed it is not an error--just an extra (and supposedly unnecessary) job needing to be done--or at least, so often--when the Page File is too small. But as I say, I have just changed it--back to a configuration I used some time ago, where the Page/Swap File is on its own partition (on the first partition on my second disk--at 2-1/2 times my Ram size.