I'm just now starting to play around w/ AC and learn things. I was shocked when I went to log in the other day and it told me my memory was used up. We had an IT tech look at things and he found that nightly back up was being saved to the computer and it was taking up the entire memory. Is your computer maybe doing this? Ours will fill up from the nightly back up with in a few weeks. We took it off and now do manual back up and will have to deal with the memory issue once I start the practice in AC on a full time basis. The IT Tech deleted all the previous back ups that were saved on the hard drive and it freed everything up and things move more quickly now as well. Is this maybe what your system is doing?