This post will tell you how to make Windows Installer work in Safe Mode.
Make Windows Installer work in Safe Mode
To make windows installer to work under safe mode you need to create a registry entry for every type of safe mode you are login into:
Safe Mode
Type this in a command prompt and hit Enter: Then start the Windows Installer service by typing: The Service will start.
Safe Mode with Network
Type this in a command prompt and hit Enter: Then start the Windows Installer service by typing: See this post if your Windows Installer keeps popping up randomly.