Mathcad Prime 11.0 for Windows 10 22H2 – Trial Download and MSI Installation Error

Hello,

I need assistance with downloading and installing a compatible version of PTC Mathcad Prime.

I am using Windows 10 Home, version 22H2 (OS Build 19045.6456).

I registered for the official 30-day free trial of Mathcad Prime and received a download link from PTC. However, the installer provided Mathcad Prime 12.0.1.0.

I attempted to install Mathcad Prime 12 twice, including running the installer as administrator. Both attempts failed with the following error:

"The installation package could not be opened. Contact the application vendor to verify that this is a valid Windows Installer package."

I understand that Mathcad Prime 11 supports Windows 10 version 22H2, and I would prefer not to upgrade my operating system to Windows 11.

Could you please help me with the following questions?

1. Where can I officially download Mathcad Prime 11 for Windows 10?

2. Is a free 30-day trial license available for Mathcad Prime 11?

3. Can I use my existing trial registration to activate Mathcad Prime 11?

4. Is there another official way to resolve the installation error without upgrading to Windows 11?

I need Mathcad to complete an academic coursework project involving numerical calculations, least squares regression, and mathematical modeling.

I would greatly appreciate an official download link or guidance from PTC representatives.

Thank you very much for your assistance.

Best regards,
Vera Zemlyanova