The specified service has been marked for deletion error

Windows service status, you can check the event log for more information about errors. If it is a third-party service, you may need to contact its developer.
However, it's worth checking the registry entry for a particular service and checking its status.
Go to : HKLM\SYSTEM\CurrentControlSet\Services\YourService\DeleteFlag.

The specified service has been marked for deletion

Occasionally when a program is uninstalled the associated service is not removed but marked for deletion requiring a reboot to complete the process. This can occur where another process has an open handle to the service, for example the services console was open at the time of removal.

To delete the service without rebooting the machine the sc delete command may be used which deletes the service's entry from the registry.

sc delete [service name]

For example:

sc delete "Advanced Monitoring Agent"

sc delete Advanced Monitoring Agent