Remove com.symantec.mes.systemextension.systemextension

I installed Norton AV onto a laptop but now need to remove it as the company require a different AV solution. I have a process named com.symantec.mes.systemextension which runs periodically and crashes because it  cannot find a particular library. I would like to remove the application from /Library/SystemExtensions/*/com.symantec.mes.systemextension and stop whatever it is that is attempting to run this process.

I have downloaded and run the Symantec Uninstall tool but still have a lot of references to Symantec in my system.

 

The following is from a text search for Symantec.

./Apple/System/Library/Extensions/AppleKextExcludeList.kext/Contents/Resources/ExceptionLists.plist: <string>symantec.networkCapture 1</string>

./Apple/System/Library/Extensions/AppleKextExcludeList.kext/Contents/Resources/ExceptionLists.plist: <string>symantec.networkCapture 1</string>

./Apple/System/Library/Extensions/AppleKextExcludeList.kext/Contents/Resources/ExceptionLists.plist: <string>com.symantec.kext.wssa 5.0.1</string>

./Apple/System/Library/Extensions/AppleKextExcludeList.kext/Contents/Resources/ExceptionLists.plist: <string>com.symantec.com.SampleKernalExtension 1</string>

./Apple/System/Library/Extensions/AppleKextExcludeList.kext/Contents/Resources/ExceptionLists.plist: <string>symantec.Process-Detection-Sample 1</string>

./Apple/System/Library/Extensions/AppleKextExcludeList.kext/Contents/Resources/ExceptionLists.plist: <string>symantec.networkCapture 1</string>

./Apple/System/Library/Extensions/AppleKextExcludeList.kext/Contents/Resources/ExceptionLists.plist: <string>symantec.Process-Detection-Sample 1</string>

./Apple/System/Library/Extensions/AppleKextExcludeList.kext/Contents/Resources/ExceptionLists.plist: <string>symantec.networkCapture 1</string>

./Apple/System/Library/Extensions/AppleKextExcludeList.kext/Contents/Resources/ExceptionLists.plist: <string>symantec.Process-Detection-Sample 1</string>

./Apple/System/Library/Extensions/AppleKextExcludeList.kext/Contents/Resources/ExceptionLists.plist: <string>symantec.Process-Detection-Sample 1</string>

./Apple/System/Library/Extensions/AppleKextExcludeList.kext/Contents/Resources/ExceptionLists.plist: <string>com.symantec.kext.wssa 5.1.0</string>