Hi John,
I discovered another setting that was slowing response to mouse clicks.
In Performance Options - Advanced - Processor scheduling, I clicked "Adjust for best performance of Background services".
Much quicker now! I'm surprised the service tech didn't change to this setting.
Cheers, Graham
Among other reasons, it's why I recommend turning all the pretty interface crap OFF. Every single one of them takes CPU clock cycles that many computers just cannot afford to give up!
Glad that it's working better, anyway.
Regards, John