Nil wrote:

On 23 Nov 2013, Les Cargill wrote in
rec.audio.pro:

Then it was done to clean up whatever. All I know is that unless I
rebuilt the machine once a year, it would degrade slowly in
performance.

I've owned and taken care of hundreds of Windows systems. That used to
sometimes happen in the bad old days of Windows 95 and earlier. Not
since Windows XP in my experience. If the system slows down, it's due
to some specific problems. Not from general "dirty registry" problems.
Leftover registry entries and disk files don't impact performance to
any significant degree unless there are other issues.

+1

Kind regards

Peter Larsen