@Rockhead,
Even I didn't have a Commodore 64.
Imac from 2006 - which means probably 2005.
now at OS 10.6.8, as far as it can go, according to the guru.
My last software update a day or two ago slapped out the then Adobe as not secure - but I'd been having trouble for a while.
Interestingly, some of the stuff I complain about that sounds like me dithering - the cursor jiggling, the space in the reply box advancing into great length extremely fast, and occasional bell like sounds.. scary happenings - hasn't happened since I'm sans Adobe Flash. May be coincidence.
The ominous part is that I've been through this pattern before, and that was when I needed a new hard drive in 2009.
(stopping non-digression, thanks for asking while kidding)