Error 1603 or 0x00000643 Microsoft Edge Installation or Update Fixed

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An error 1603 or 0x00000643 may occur when installing or updating Microsoft Edge. They can occur due to corrupted registry keys in Windows 10. In this article, we will explain how to correct these errors.

Errors 1603 or 0x00000643 when installing or updating Edge

In addition to registry problems, this also occurs because of the problem with installation services. Follow these suggestions to fix it:

  • Running the program installation and uninstalling Troubleshooting
  • Windows Installer Troubleshooting
  • Activate the trusted installer

April 2021 Update:

We now recommend using this tool for your error. Additionally, this tool fixes common computer errors, protects you against file loss, malware, hardware failures and optimizes your PC for maximum performance. You can fix your PC problems quickly and prevent others from happening with this software:

  • Step 1 : Download PC Repair & Optimizer Tool (Windows 10, 8, 7, XP, Vista – Microsoft Gold Certified).
  • Step 2 : Click “Start Scan” to find Windows registry issues that could be causing PC problems.
  • Step 3 : Click “Repair All” to fix all issues.


Microsoft suggests reporting the problem as soon as it occurs for the first time. You must also execute these suggestions as an administrator.

Error 1603 can be caused by corrupted Windows system files. Corrupted entries in system files can pose a real threat to the health of your computer.

Many events may have caused errors in the system files. Incomplete installation, incomplete uninstallation, incorrect removal of applications or hardware. It can also be caused by restoring your computer after a virus or adware/spyware attack or an inappropriate computer shutdown. All of the above activations may result in the deletion or corruption of Windows system file entries. This corrupted system file results in the absence of information and files that are incorrectly linked and necessary for the proper functioning of the application.

If you have tried to download and install Microsoft Edge Browser on your Windows device and you have received error codes and error messages during browser installation, this article will help you solve this problem.

Here are some things you should try if you experience installation or update errors:

  • Check your operating system. Microsoft Edge Insider versions are currently only available on Windows 10. Other versions of Windows are not currently supported.
  • Check your VPN. If you have received a 403 error, you may need to change the way you connect to your network. For example, try to connect directly to your domain.
  • Check your connection settings. Parental control, antivirus or firewall settings can block your installation or update.
  • Check your trusted websites. If you use Internet Explorer to download builds, you may need to add to your browser’s list of trusted websites.
  • Try to download the program again. Uninstall your Microsoft Edge Insider version and try again.
  • Restart your computer. If there is still a problem, uninstall your Microsoft Edge Insider version and try again.

Use the registry editor

registry editor - Another installation is in progress in Windows 10

This may happen if the installation program is run directly from another browser after downloading. Try opening the Downloads folder on your computer and run MicrosoftEdgeSetup.exe in this folder.

If the installation program is not found, use the registry editor to delete the following key – HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\EdgeUpdate\Clients\{F3C4FE00-EFD5-403B-9569-398A20F1BA4A}.

To launch the registry editor, press Windows + R. Type regedit and press Enter. Download and reinstall Microsoft Edge Insider Build.

RECOMMENDED: Click here to troubleshoot Windows errors and optimize system performance