Q: Kernel Panic after installing El Captain

Please post some of the panic reports

Kernel Panic reports

<http://support.apple.com/kb/ht2546>

<https://support.apple.com/en-us/HT201753>

Try booting into Safe mode, which will not load any 3rd party kernel extensions, the #1 reason for kernel panics after doing a major operating system upgrade

<http://support.apple.com/kb/ht1564>

You could alos post the EtreCheck output and someone in the forum will analyze it.

<https://discussions.apple.com/docs/DOC-6174>