What could be the reason why my Mac 2009 EI Capitan always pop that the installer disc could not be found please install your window installer and wait for the windows to be recognized each time I try installing window 7

Hello Georgem1234,

Thanks for reaching out to Apple Support Communities. We see you have some questions about installing Windows with Boot Camp on your Mac, and we'd like to help. With issues using Boot Camp, the following link can provide helpful tips to assist with different issues you may come across: Troubleshoot Boot Camp Assistant problems on Mac - Apple Support

Let us know if this helps.

Regards.