OK, I've had this happen before, such as when I installed AVG AV. I know the trick for the IRPStackSize reg edit. However, I am encountering more and more of this on my network on CPU's and drives that never did this before. Strangely enough, it may affect only some of the drives on a CPU and not others. I've tried all different settings for the StackSize value and it does no good. None of these CPU's has had AV on them as they don't sit on the web and are on a closed network. I had one CPU that was fine this morning and on the next reboot I could not share a video folder any more, but every other share off it worked fine. Anyone else encountering this? Thanks.