thanks Bert and Sandeep .
When I highlight and double click on the patient on the desk top my CPU usage goes up from 3 % to an average of 33% ( tried it on several different patients) . Dont know if this is significant.
I know using wireless is not ideal but it is the best solution for me at present as I use the lap top room to room and also use it at several satellite clinics.
Did consider uninstalling and reinstalling AC but it seems slightly better today .
thanks
Bala