If you set a password on Reolink Client before but can't remember it, you can follow these steps to solve this problem.

Windows Client: 

Step 1. Go to the AppData folder manually by going into your Users folder, which is there in the C drive. The path is C:\Users\ADMIN.

Step 2. Go to the "View" tab at the top and check the "Hidden items" checkbox, as shown below:

Windows-10-Hidden-items.png

Step 3. You should be able to see the AppData folder in your User folder.  Go to AppData/Roaming, then delete the reolink folder.

reolink folder.png

Step 4. Done! You can turn on the Reolink Client without a password now.

Mac Client:

In your PC file system, please choose ~/Library/Application Support/reolink to delete the configuration file:

reolink_delete_mac_client_password.png