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Getting Windows installer error 1603 on your PC means Window fails to install a program successfully. Most often when you try to install a program on system using ‘Windows Installer’ then error code 1603 occurred. Windows Installer is one of the important components of Windows PC which is mainly used in installing or updating a Windows program.

Error 1603: A fatal error occurred during installation


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It is very frequent that due to installation failure, using incompatible driver and attack of virus and spyware infection your system starts behaving abruptly. For this behavior of Windows various reasons are responsible. Some common causes of Windows Installer Error 1603 are:

  • When short file name creation is disabled on the target machine.
  • If install script custom action is prototyped incorrectly.
  • If setup is corrupted after installation then fatal error code 1603 prompts.
  • Using incompatible Widows driver
  • When a file locked and cannot be overwritten.
  •  Virus, spyware or malware infection
  • Incorrect registry entries

Windows Installer error 1603 is one of the critical error generally affect the Windows based PC. While installing a windows program you will receive 1603 fatal error code. After having this error code you become unable to install a program and in the mid of the installation it stops all the running process and it make changes in system activities. If you are ignoring this error code continuously then it might be more dangerous for your system files. You might have to face severe data loss or system crash immediately. So it is better to take an immediate action to resolve Windows error code 1603.

How to Fix Windows error code 1603

Manual Method

To get rid of Windows fatal error code 1603 manually you need to follow below steps.

Step1. Open the Registry Editor by inserting ‘regedit’ word in Run dialog box.

Step2. Delete all the incorrect registries from the page.

Step3. Close all the Windows installer Error 1603 programs that are running on PC.

Step4. Search for the automatically created malicious files and delete all of them.

Step5. Uninstall Windows 1603 Installer program.


Free Download Advanced System Repair Tool

Compatible with the Windows® 7 32-bit and 64-bit Operating System, Windows Vista® 32-bit and 64-bit, Windows® XP 32-bit

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Above manual steps might be effective and may fix fatal error code 1603 from windows computer. But these manual steps might be lengthy and risky because any mistake may cause severe data loss with Windows system. Automatic steps of Windows PC repair Tool are the best option to resolve error code 1603. User friendly steps of this software remove incorrect registries and virus, malware and spyware from PC automatically. By downloading demo version of the software you can scan your system and fix Windows error code 1603 automatically.

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Resolved Windows Installer Error 1603

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