About computer health in LogMeIn Pro
Health is an indicator shown on the Computers list.
Health indicator icons are color coded and represent the single most serious problem detected on a host. They are shown in the Health column in Detail view.
Health is determined by Windows updates and anti-virus settings.
Health indicator icons:
The host requires reboot to finish the installation of important Windows updates or the Windows updates service is not running on the host. There is a critical issue with the anti-virus software. 
There is an issue with the anti-virus software or the installation of important Windows updates is pending on the host.
The host is running the latest Windows updates and the most up-to-date virus definition.
You must update the host to see its full health report.