|OK, I have a Compaq Presario computer.|
There was no hardware change except for adding a new RAM stick into the system over the past 5 years.
Now, the system freezes up any time.
It does not freeze during boot.
It freezes when I am surfing the internet or running Task Manager.
When it freezes, the hard disk stops spinning.
Keyboard will not work and the mouse cursor freezes.
even taking an USB drive out from the system does not help to make windows respond..
A hard disk scan with SMART hard disk technology does not reveal any sign of hard disk problems.
I use the machine for development purposes.