how can you fix MSI error 1603 immediately?

Upon installing a program on the PC, some users might annoyingly receive a MSI error 1603 stating that “error 1603: A fatal error occurred during installation”. Sometimes, it also comes together with a message saying something like this “If you click on the OK button, the installation just rolls back. What isup and how can you fix MSI error 1603 immediately?

When cannot install a certain program because of a MSI error 1603, check and make sure there is nothing wrong with the setup.exe file. A corrupted, incomplete downloaded setup file at most of the time is the main cause to this install error. Download the file from the official website again and you may be able to install it with an error.

Also, scan the computer for viruses. We know that once the computer is infected by viruses, lots of system resources will be taken up, which greatly slow down the computer. What is more terrible is that they are able to attack and remove some files like iaStor.sys from your computer. If your setup file is infected, you may fail to successfully install it. So to install what you want without the MSI error 1603 message, what you need to do first is to install an reliable anti-virus program on your computer, and regularly scan your computer to make sure that it is always far away from viruses.

Also, make sure that this service is not disabled on your PC. You can check this by following the below steps:
* Click Start and type service.msc in the Search box; press Enter to continue.
* When the Services window opens, right-click on ‘Windows Installer’ service, then click ‘Start’. The service needs to set to “Start” so as to install applications on your PC without any errors.
* Now try to install or uninstall the program again. If the MSI error 1603 persists, try the next fix.

However, one main cause of the MSI error 1603 should be a problematic Windows registry. There are a couple ways for the registry to go wrong such as uninstall and the reinstall the programs, or correct it by downloading the specific Dll file if you are able to find the name of file and download it from the Internet. If the system or the Windows installer engine cannot locate its needed entries to install your program, an error message will appear. The easiest way is to download and run a best registry repair tool. Cleaning your Windows registry will help you quickly check and eliminate these errors. Besides, the registry repair toolkit will quickly scan your computer for potential problems and automatically fix them for you.

Well, I believe you have troubleshooted and fixed MSI error 1603 on your own right now with the above solutions! If you fail, leave me a comment and I will try whatever I can to help you!