I re tried using the PAE kernal (which I should have tried in the first paace) gut I am getting the same basic message
warning: rpmts_HdrFromFdno: Header V3 RSA/SHA256 signature: NOKEY, key ID 0608b895
epel/gpgkey | 1.7 kB 00:00
Public key for dkms-2.3-1.20161202gitde1dca9.el6.noarch.rpm is not installed
Not sure where to go from here. I did do an update before I started.