First, make sure they're running the latest version of Windows 10. (Some people insist on disabling updates, and it creates a ton of problems). So verify that first -- it's actually important.
Next, yes, use the latest version of TurboActivate.
Lastly, make sure their network adapter drivers are updated. A simple google search will find them.
>> "The only unusual thing i could see on the customer pc as i was doing remote help, was a hidden network device, "Ras Async Adapter", which was enabled anyways."
Probably the source of the problem. Try uninstalling it.