thank you all so much for all the useful suggestions .
I am running a PC as the server and the OS is win 7 ultimate . Mots of the time it is happening on the server PC.
It seems to happen even when I close AC on the server PC at the end of the day and then remote in the next day to start it so I think that like Bert says it is not completely shutting down even though it seems to be . For example when I click on the AC icon to start it on the server PC it will come up with this message. The task manager actually does not show AC as running which is what i find strange . The task manager shows no processes as running. It has happened on other client computers as well but rarely and usually responds to restarting the computer.
I will download the batch file as recommended
hope this clarifies my problem
thanks again
Bala
