If your miner is being constantly disconnected from the Orax orchestrator with an
abnormal closure error it may be caused by the usage of a VPN, a firewall or an antivirus. Try disabling them one by one to identify if any of those are responsible for the disconnections. In the case of the firewall or antivirus, you may need to add a special rule to whitelist the Orax client.
Check Windows sleep and hibernation settings. Windows may automatically put your computer to sleep or hibernation after some time if you are not using it, which will halt all running processes, including mining. You need to change Windows setting so that the computer stays awake even when not interacted with.