Hello XxXenoZzZ,
First, please refer to the solutions on the following FAQ page.
https://www.bandicam.com/faqs/cannot-run/
It might be a problem with the graphics driver.
Please uninstall the graphics driver completely.
And then, please install the latest version of the graphics driver and try recording again.
Also, please uninstall and install the latest version of Bandicam.
https://www.bandicam.com/downloads/
If it does not seem to help, please let us know your Bandicam format settings, your recording target, and your PC specs such as CPU, GPU, OS, and graphics driver version.
Thank you.