Close all background Apps
Check to ensure the program isn’t already installed
Make sure you have enough space on your Hard drive
Delete temporary files in the Windows Temp folder
Use Microsoft Fix it a tool
Change the location of your Installation
Restart Windows installer service
Register Microsoft Windows Installer Service Again
Fatal MSI error can certainly be caused by one or more corrupted Windows system files. To fix the problem: Make sure your computer is up to date with all available Windows modifications. Make sure you’re signed in to a Windows account with administrator security and open a Command Prompt instance.
To fix fatal errors during software installation, do the following: Remove file types from previous installations. Use Microsoft’s Windows Installer Cleanup to remove records of previous installations. This utility does not remove the files installed by the corresponding installation, which sometimes have to be removed manually.
Try this (no solution): Right-click on the file and choose “Open With” from the menu. Try selecting Windows Installer. it might work. if not, try running msi as officer. Open an elevated command prompt by typing MSIExec and type Winner to see if there are almost any errors. Open Services and find the Windows Installer if you are uninstalling it to change it manually.
Why is MSI error 1603 fatal error during installation?
MSI box formats are used to install and uninstall software. When Windows displays useful information to properly install software, the user sums up with error 1603. The error message “Fatal error 1603 during installation” appears. What causes error 1603 Fatal error during installation?
How do you fix error 1603 A fatal error occurred during installation?
How to find error code 1603?
- Close the informational software.
- Make sure the software is not yet mounted.
- Make sure there is enough disk space for the program.
- Delete the temporary images from the Windows temp folder.
- Restart my Windows setup service.
< li >Open the installer and uninstall the troubleshooter.
How to fix error code 1603 fatal error during installation?
For automatic fixes, you must download and use Microsoft Fix it Help. After downloading the program, install it on your computer and run the program. Now the program often fixes a fatal error when installing and uninstalling the program. The above wording solves the problem in most cases.

Ermias is a tech writer with a passion for helping people solve Windows problems. He loves to write and share his knowledge with others in the hope that they can benefit from it. He’s been writing about technology and software since he was in college, and has been an avid Microsoft fan ever since he first used Windows 95.