When I tried to upload my videos from the 10c to my computer my anti-virus software prevented me from reading my alternate drive that I was connecting the 10c to. When I disabled the software it uploaded just fine. I have found that this is the case for other customers as well. Perhaps a software upgrade could be used to automatically shut down the anti-virus software whil in the upload video mode. At a minimum this possibility should be identified in the users manual from your web site.
Anti - Virus software block