When you get "Network Error (99) Unknown Network Error" on your Windows AVSS client, please uninstall your AVSS from your PC and then install the following AVSS to try.

You can download the latest AVSS from the link below.

After the installation is successful, if you have already registered a username and password for the Zosi Smart APP on your phone,

you can use your Zosi Smart APP username and password to log in to your AVSS client.

If you haven't registered a Zosi Smart APP username yet, when using AVSS for the first time, you need to click "sign up" to register

an account first.

• Language: Select your language
• Region: Select your country
• Account: Enter the correct email address
• Verification Code: Check the verification code in the email you provided
• Check "Have read and agreed to service terms and privacy policy"
• Click "Next"
• Set a new password for your AVSS account.

After successful registration, you can log in to your account to add devices.

Two methods for adding devices: adding via local search and adding via device ID.

You can find the model number and ID on the label of the NVR.

Please let us know if you have any questions.