Adobe activation file missing help

Hi all, i have the Adobe CS Suite and recently if Photoshop has been open for a few hours i will get a warning dialogue box saying that "the ativation file is missing and will have to close down Photoshop"

I can then start up Photoshop again and it will be fine for a few hours! and the process repeats!

Anyone got any ideas what is going on?

Sounds like you have some kind of tool on your system that is messing with the activation file. Backup software perhaps? Is the computer on a network?

Hi, yes i use Nortons Ghost every evening and the computer is on a network of around 60 pc's!

I have been conneted to the network and have had ghost for over a year now and it's only in the last past week i have had this problem??