When an application or other process ends abruptly, Microsoft Windows often compiles an error report designed to explain what went wrong. Sometimes this results in an error message like "Runtime Error R6025 Pure Virtual Function Call." This error means that an application tried to call upon a virtual member function from a source that wouldn't accept that call. For example, if you are playing a video game hosted online and the server goes down, your computer could generate this error.
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Read the Runtime error message to see what program crashed. Click "OK" to close the error message window.
Hold down the Ctrl and Shift keys and press the Esc key to launch Task Manager.
Click the "Processes" tab and click on the "Image Name" column header. Scroll down through the list of processes to make sure the original program that gave the error message is not on the list. If it is in the list, click it and then click "End Process."
Restart your computer, and open a Web browser to ensure you have Internet access. If you don't, wait until your Internet is running again. Open the the program that crashed.