Thanks for the suggestion, hazelnut. I've just run an analysis in safe mode, but, alas, with the same outcome: the scan stops (stalls/completes?), both the 'Analyze' and 'Run Cleaner' buttons become available, and no scan results are displayed.
Thanks again. I'll give both of the above a try and report back on developments.
Incidentally, I was advised that a newer version of CCleaner was available when I started it up today, so I d/led and installed it before I tried yet another scan, but it hasn't resolved the problem.
Would installing an older version of the software perhaps cure the problem? Was CCleaner around at the time of ME's release (you know, back when dinosaurs were roaming the planet *grins and rolls eyes at my archaic technology*)?
Many thanks, davey. I'm a bit hesitant to tinker, perhaps unnecessarily, with an otherwise fully functioning set-up so I'll try the simpler options first and if that doesn't solve the issue, I'll give reinstalling Visual C++ a go.
Thanks again to everyone who's offered advice. It's much appreciated.