I too am having this problem. My save folder has always been on my 750 GB external hard drive with over 600 gig free. I started getting the Disk Problem message this morning so I moved everything to my 500 GB external drive that has been freshly formatted and empty prior to the move. I get the same error message. I have used both drives for saving in the past with no problems. I have not scheduled any downloads in several days so I doubt the queue is a problem. I am the administrator of this computer so THAT is not a problem. My problem is not intermittent. Every download gets stuck and none get through. I am running XP Pro with 2 gig memory.