Colin, It's interesting you should say this. Since installing the update, I've had some random restarts on my home computer. I haven't noticed problems on the observatory computer. Looking at the System Events log didn't reveal anything obvious. In checking the "CBS.log" file in C:/Windows/Logs after running sfc /scannow, which said it did do repairs however, I couldn't find any specific reported errors that needed fixing. A second run of sfc /scannow ended without reporting errors. Googling some of the CBS.log more-detailed statements (didn't say they were errors) suggested running "chkdsk /f" - no provblems there.

We'll see how it goes.