In Safe Mode, Windows has reduced functionality, because only the core components have been loaded. In some conditions we need to run into Safe Mode in order load into Windows Desktop to fix computer problems such as disable some Services, Drivers, Check Disk, Defragement and sometime need to uninstall programs that make serious damage to your system. Unfortunately in Safe mode we can’t install or uninstall any software, Because of the Windows Installer Services has been disabled.
It is also not possible to start the service manually, an error message will come up saying “Could not start the Windows Installer service on Local Computer. Error 1084: This service cannot be started in Safe Mode”.