You receive an "error 1603: A fatal error occurred during installation" error message when you try to install a Windows Installer package

Hi Shekhar,

Let us follow the methods given below and check if it helps.

1)      What are the troubleshooting steps that you have followed to fix this issue?

2)      Do you remember making any changes prior to this issue?

I would suggest you to run the fixit provided in the article given below and check if it helps.

Fix problems with programs that can't be installed or uninstalled

http://support.microsoft.com/mats/Program_Install_and_Uninstall/

I suggest you to follow the methods given below and check if it helps.

Method 1: Reregister the installer engine and later try to install.

a)      Press Windows key + X, select Command prompt (Admin)

b)      At the command prompt, type:

c)      Type msiexec.exe /unregister, and then press ENTER.

d)      Type msiexec.exe /regserver, and then press ENTER.

Let us also check if the Windows Installer service is not set disabled.

Method 2: Follow the steps given below.

a)      Press Windows key + R,

b)      Type services.msc and then press Enter to open Services.

c)      Right-click Windows Installer service, and then click Properties.

d)      If the Startup type box is set to Disabled, change it to Manual.

e)      Click OK to close the Properties window.

f)       Right-click the Windows Installer service, and then click Start.

Let us also perform a System file checker scan and check if it helps.

Method 3: Run a system file checker scan and check if that helps.

Refer the following steps to run SFC scan:

a) Move the mouse pointer to bottom left of the screen where you see preview of start menu and Right-click to bring up a list of Windows settings.

b) Click on ‘Command Prompt (Admin) to bring up elevated command prompt. Note: Click ‘Yes’ if it prompts for permission.

c) In the command prompt type in the following command: ‘sfc /scannow’.

Note: It may ask for windows installation DVD to fix and to enable SFC to make more than minor repairs.

Hope the information helps, if you have any further queries, feel free to post. We will be glad to assist you.