I have turned Acrobat Auto Update off because I just ran into the third time where my PC ran out of memory and crashed because the Update process started while I was in the middle of working with several other applications, including Acrobat. I would be fine if the updater provided an indication that updates are available, and the ability to choose the update time, but I hate losing work because a program chooses to start an automatic update in the middle of other more important work.