Hi,

Thanks for using Sage City.

Installation error ‘1603: Fatal error during installation’ most commonly occurs if you don't have the correct Windows user permissions to access the areas affected by the installation.

To resolve this ensure you're logged into Windows as a user with full administrator privileges.

When installing Sage 50 Accounts v21 and above, this message may appear when installing the standalone Sage Data Service. If so, check that .NET Framework 4.5 is installed, if not install it.

If this doesn't resolve your issue, refer to Microsoft knowledge base article ID: 834484.

This error can also occur if your disk or download file has become corrupt. To resolve this you can download the software again.

I recommend restarting your computer before trying again.

Full info on troubleshooting and resolving Sage Accounts installation issues here.

If this has answered your question please click More > Verify Answer.

Regards,

Ian

Sage UKI