The Windows Installer Service is the subsystem that Windows provides for adding or removing software. Many software applications rely upon the Windows Installer Service and they cannot be removed cleanly (or easily) if it’s not working. Most of the time it works fine, but there are always exceptions.
There are many situations that can occur where you may find yourself stuck in “Safe Mode” trying to remove a program (e.g., a program crashes your computer while it’s trying to boot). This is complicated by the Windows Installer Service not running while in “Safe Mode”.
Thankfully, there is a kind gentleman named Harry Bates that wrote a freeware tool called SafeMSI. It will enable the Windows Installer Service to run while Windows is running in “Safe Mode”. The usage of this tool is simple:
- Download the tool
- Extract the contents of the file you downloaded in Step 1 to a memorable place (e.g., your Desktop)
- Run the tool while in Safe Mode