When the Windows installer error code 1603 is triggered, the active window crashes. If you encounter this error, your PC is running slow or freezes frequently without prior notice. You receive the error message Windows Installer 4.5 Error 1603. The error also occurs when you try to install something on your Windows or when you use a Windows Installer package to install a program. If you encounter the same error.
Primary reasons that cause Windows Installer Error 1603
The Windows installer error 1603 is a runtime error. This can have various causes, including some:
- Due to a corrupt or incomplete installation of the Windows Installer software.
- Even if the Windows registry files can get damaged and probably cause the error.
- Virus or malware attacks can also produce error code 1603.
Finally, if a file is deleted maliciously or accidentally, you are faced with the runtime error.
Simple procedure to fix a fatal error during installation
To quickly fix the error code 1603, you need to go through the following methods:
Method 1: Change the installation location
To fix the installation error, you should try the most primary solution first. Try to change the installation location and check if the error is resolved. Create a new folder and use it to install the program you are downloading.
Method 2: Uninstall the program
If the program is already installed, try installing it again and see if the error is resolved. First uninstall and then reinstall it. Uninstalling it will remove all associated bugs with the program.
- First open the Control Panel.
- Click on the programs and then on the Programs and Features option.
- Now you need to find the program you want to remove and click on it. Click on the Uninstall option and then wait for the process to complete.
- Then reboot your system.
- Now reinstall the program and check if the error resolved.
Method 3: Restart the Microsoft Installer service
You can also fix the Windows installer error 1603 by resetting the Microsoft installation service. First you need to start the Windows Installer service.
- From the keyboard, you need to press Windows and R key to bring up the Run dialog box.
- When the window opens, enter the command “services.msc” in the blank field.
- Now you need to find the Windows Installer option and double click.
- Press the Start menu and then under the service status you need to press OK.
- Now to re-register the Windows Installer service and follow the steps below:
- First click on the Windows logo key and R at the same time.
- When the window opens, type the command “msiexec / unregister” and press the Enter key.
Method 4: Get full permissions on the disk for installation
The error can also occur if you don’t have full permissions on the file location to install them. To obtain permission, perform the following steps:
- First you need to open the file explorer and then select the Properties option.
- Now go to the Security tab and then click Edit.
- Then click the SYSTEM option and check the Allow each item box in SYSTEM Permissions. You must do the same for the administrators.
- Now click OK and go back to the Properties dialog box.
- Then select Advanced and then click Change Permissions.
- When the tab opens, click the Administrators option and click OK. You must perform the same steps for System and then click OK.
- When you are done, check if the Windows installer error 1603 is still resolved.
Method 5: Scan your device
If your device is infected by a virus or malware, you may encounter the Windows installer error 1603. Therefore, perform a full scan to find the issues. Scanning will help to identify the problems and after removal you will no longer face the error. If you don’t have third-party antivirus software, you can use Windows built-in antivirus software, Windows Defender.
Method 6: Update the device drivers
If you use a wrong, corrupt, missing or outdated driver, you will encounter the same error. You can update the device drivers to correct the error. You update the drivers both manually and automatically.
To upgrade the driver manually, you must visit the manufacturer’s website and get the latest version of the driver. Make sure the driver you install is compatible with your device. Now download and install the driver correctly and restart the device when the process is complete. Finally, check if the error fixed or not.
Automatic driver update to Fix Error Code 1603
- First run a full scan on your computer to find driver problems.
- When the window appears, you will receive two options: Update All and Update All.
- You can click on either. Clicking the Update option will automatically download the driver, but you will have to install it manually.
- You can also select the Update all option. If you choose this option, both the driver download and installation will be automatic.
- The process may take several minutes. When the installation is complete, restart your system and check if the error fixed.
Fix Error Code 1603 Via Device Manager
Alternatively, you can also upgrade the driver via Device Manager. Follow the steps for a successful upgrade.
- First, you need to click the Windows key and R at the same time to bring up the Run dialog box.
- When the Run dialog box appears on your computer screen, type “devmgmt.msc.” Press the Enter key and Device Manager will open.
- Double click the USB controllers option and then click the ‘USB Composite Device’ option to select the ‘Update Driver Software‘.
- Finally, click on the “Auto Search” option, which we will search for the latest updates and then update the driver.
- When the wizard appears on your computer screen, follow the instructions that appear to complete the process.
- When the process is complete, restart your system and check if the error persists.