Besides the clean/upgrade question, please post wheather you are using :
Laptops that have a trackpad (synaptic device) or Laptop with a trackpad + external USB mouse or Desktop with a USB mouse.
Besides the clean/upgrade question, please post wheather you are using :
Laptops that have a trackpad (synaptic device)
or
Laptop with a trackpad + external USB mouse
or
Desktop with a USB mouse.