I am having issues with Windows Defender and Norton 360.

Hi,

You need to check with Norton/Symantec Support, their on-line documentation,
and ask in their forum about known issues.

Norton Support
https://www-secure.symantec.com/norton-support/jsp/product.jsp?lg=english&ct=united+states&product=home&version=1&pvid=f-home

Norton Support
http://us.norton.com/support/

Norton - OnLine Community
http://us.norton.com/community/

You can uninstall it and run the Norton Removal Tool to prevent trouble causing
remnants. Use the Windows 8 Windows Defender which is a full antivirus based
on MSE (unlike WD is previous Windows versions).

Norton Removal Tool
http://us.norton.com/support/kb/web_view.jsp?wv_type=public_web&docurl=20080710133834EN&ln=en_US

List of anti-malware program cleanup/uninstall tools
http://answers.microsoft.com/en-us/protect/forum/protect_start/list-of-anti-malware-program-cleanupuninstall/407bf6da-c05d-4546-8788-0aa4c25a1f91

Uninstallers (removal tools) for common antivirus software
http://kb.eset.com/esetkb/index?page=content&id=SOLN146 

====================================================

Windows 8 includes an automatically loaded updated version of Windows Defender
which is a full antivirus based on Microsoft Security Essentials.  (Windows Defender
for XP, Vista, and Windows 7 was only antispyware.) So if you upgrade the protection
is automatic.

Windows Defender and Windows SmartScreen fight viruses and other malware
http://windows.microsoft.com/en-US/windows-8/windows-defender#1TC=t1

How to Create a "Windows Defender" Shortcut in Windows 8
http://www.eightforums.com/tutorials/6862-windows-defender-create-shortcut-windows-8-a.html

How to Add a "Windows Defender" Cascading Desktop Context Menu in Windows 8
http://www.eightforums.com/tutorials/8450-windows-defender-cascading-desktop-context-menu-create-windows-8-a.html

===================================

You can Search for Defender - Win Key + W

Windows Defender - in the Settings tab - Administrator - check or uncheck (as desired)
Turn on Windows Defender.

Hope this helps.

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Rob Brown - Microsoft MVP <- profile - Windows Expert - Consumer : Bicycle <- Mark Twain said it right!