If you see Runtime error R6025 - Pure Virtual Function Call message when running an app, then one of these fixes is sure to help you.

Fix The installation process did not complete within the required time limit. Error code 0xc1900104 and MOSETUP_E_PROCESS_TIMEOUT.

Over on his blog our hacker [Scott Baker] restores a Prompt 80, which was a development system for the 8-bit Intel 8080 CPU. ...