How to factory reset N800P

I forgot admin password. I can't access everything.
I remove HDD and battery but nothing change.
How to recovery password or factory reset.

Thank you.

Hi, please use super password,  password update every day.
Date: 20190219     password is 684353
Date: 20190220     password is 253038

VS-support1 replied at 2019-2-19 15:11
Hi, please use super password,  password update every day.
Date: 20190219     password is 684353
Da ...

Thank you. but today 20190220 password 253038 is not working.

dezember replied at 2019-2-20 21:35
Thank you. but today 20190220 password 253038 is not working.

Dear customer,
Please give me your product photos. I will check it first.
because there are two kinds of N800P NVR in or factory.

Hello. I forgot my admin password. Please help me.

Californiateam replied at 2019-11-7 02:45
Hello. I forgot my admin password. Please help me.

Hi, Sir/Madam,
There are three kinds of model in our camera, please tell me your NVR model first.