ds7608ni-e2/8p

HI I recently purchased a secondhand Hikvision DS-7608NI-K2/8P online and seller is unable to share the password for IP cameras that were previously installed on the machine. I have tried factory resetting the machine and been unsuccessful. I desperately need some help in deleting those...

Hikvision please help cant enter camera settings hikvision nvr mdl...ds7608n-e2/8p.... camera mdl ds-2cd3345 chinese version was told it was all genuine hikvision when buying I'm only new to this guys so take it easy on me first of all nvr is not connected to the net i have sadp tool...