Tis the Spring of Norton - there have been more Norton caused kernel panics in the past 2 months than from any other source
com.symantec.ips.kext 9.0.2
com.symantec.nfm.kext 9.0.1
com.symantec.internetSecurity.kext 9.0.3
com.symantec.SymXIPS 9.0.1
Uninstall Norton using the vendors uninstall instructions.
DO NOT re-install Norton.
Do not replace Norton with someone else's waste of disk space and electricity anti-virus package.
Read the following
Effective defenses against malware and other threats
https://discussions.apple.com/docs/DOC-8841
If you just cannot sleep at night depending on Apple to protect you, then MalwareBytes. The free, run it manually version.
MalwareBytes run manually is all you need, as there are no self-propagating viruses attacking the Mac. All malware and adware requires you to be tricked into installing it.
Trick are scareware web browser popups. Phone calls saying they are from Apple. Downloading software from an aggregate download web site, and they wrap the free software in their own installer, and then do a side-load of adware which they get paid to do. A developer that makes money side-loading adware with the app they wrote. Going to a questionable website to get something you should pay for, but it is offered for free (often these sites side-load malware to steal from your system).
If you do not get tricked, follow the instructions in the Effective defenses link, you should be more that safe.
