Luca, I was able to copy the folder to the machine's d: partition was when I installed XP on the c: partition as a sanity check. Later I put Win 7 back on the c: partition and did a a couple tests copying the folder between d: and e:. I did not encounter any errors so I went back to troubleshooting the network copy issue which, for me, is consistently reproducible. I took a look at the samba bug (Thanks for the link). Looks a lot like my problem, but one of the tests I did was to monitor Task Manager for memory, thread, and handle usage during the copy. A good chunk of memory was allocated, but nowhere near maxed out, and I didn't see any spike occur in threads or handles. It doesn't appear to be a resource shortage, even though the error messages suggest it is... I'm still baffled. Thanks, Ken.C