Thank you for the response.

I have actually boiled the problem down to the executable that I am using to pull the file: PSCP.exe. If I call this exe from a command line, I have no problems. If I call it from any scheduled task (SQL or Windows), it locks without error. If I call a batch file containing a call to this executable it works, if I schedule the batch file it locks. I am currently testing WinSCP, and I am hoping that this executable, as it is specifically compiled for a 64 bit windows os, will resolve my issue.