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.