A professional diagramming tool that helps users visualize complex information through easy-to-understand diagrams.
Hi Afzal Hussain1!
I am Shakiru, and I am glad to be helping you out today.
Error code 30204-44 typically occurs when there’s a conflict with the installation of Office products. Since you have Office 2021 64-bit installed and are trying to install Visio 2019 Pro 64-bit.
The trick to fix this is to install the older version first before the new version (that is, Visio 2019 before MS 2021)
See Alexis Arturo's comment on the thread below with a similar issue:
Error code 30204-44 when trying to install MS project 2019 - Microsoft Community
Let us know how it goes.
Thank you
Best Regards