Hi Shelly Enright ,

Thank you for reaching out and sharing the details of the issue you're encountering with Sage 50 on Windows 11. I understand how this can disrupt your workflow, especially after years of smooth operation.

The error message you've received typically occurs when the Sage 50 installer or update file is set to run in compatibility mode for an older, unsupported operating system. Since you've mentioned that you're not running Windows XP and are on Windows 11, this seems to be a compatibility mode issue rather than an actual OS problem.

Here's how you can resolve this:

Method 1:

• Download a fresh copy of the Sage 50 installer file. Attempt to run this new installer and check if the software installs without any errors.

Method 2:

• Navigate to the installer file that's causing the error. You can usually find the automatically downloaded installer files at C:\Users\Public\Documents\Sage Software\Simply Accounting\Download.
• The file will likely be named similar to SA_20CP1.exe for full products or SA_20CPUP1.exe for updates (the *** represents the year and release number, like SA_20193CP1.exe for the 2019.3 release).
• Right-click on the installer file and select 'Properties'.
• Go to the 'Compatibility' tab.
• Ensure that the option to run the file in compatibility mode is unchecked. If it's not clickable, select 'Change settings for all users' first, then uncheck the compatibility mode option.

Please try these steps and see if it resolves your updating issue. If the problem persists, do not hesitate to get back to us, and we can explore further solutions.

Warm Regards,
Erzsi