Errors 1603 or 0x00000643 when installing or updating Edge
Apart from registry issues, it also occurs because of the problem with the installation services. Follow these suggested fix: Microsoft suggests reporting the issue if it’s happening for the first time. You need to also execute these suggestions as an administrator.
1] Run Program Install and Uninstall troubleshooter
If the error occurred while updating Edge, it’s a good idea to run to use Program Install and Uninstall troubleshooter. The program will fix corrupted registry keys on 64-bit operating systems, keys that control the update data. It will also fix the problems that prevent new programs from being installed, existing programs from being completely uninstalled or updated, and issues that block you from uninstalling an application through Add or Remove Programs
2] Troubleshoot Windows Installer
The problem is also related to Windows Installer. If Microsoft Fix it is not able to resolve the installer issue, we suggest you manually fix it. There are two solutions to this.
Follow our guide on Windows Installer not working where we will reset the installer service.Also, you can choose to make Windows Installer run in Safe mode.
3] Enable Trusted Installer
TrustedInstaller.exe is a process of Windows Modules Installer service in Windows 10. Its primary function is to enable installation, removal, and modification of Windows Updates and optional system components. Follow this guide, and make sure it in auto mode. We hope these solutions resolve Error 1603 or 0x00000643 – Microsoft Edge Installation or Update error. Post this; you should be able to update Microsoft Edge as usual. Related read: Microsoft Edge installation & update errors.
