Hi there. Yes, we do know of something you can check. Some antivirus/security software can affect scanning in strange ways. Try turning off or quitting that software on your local machine and then see if you can scan it. If that fixes it, then you might be able to disable a small part of it, sort of like setting exceptions in your firewall. Because you don\'t want to disable the entire software.
Hopefully that is it, but do let us know and it might help if we know the name of the security software.
And if this is your problem, there might be something we can do about it in the future.