I installed Norton Internet Security 2009 Trial a couple of hours ago and soon after, discovered that right clicking on a file in Windows Explorer caused explorer to crash. Same thing happens with xplorer2 file manager. After googling around I went into HKCR * shellex ContextMenuHandlers and renamed "Explorer Plus" to zExplorer Plus - coz I had seen this supposedly worked for Power Desk. It worked for me too - right click doesn't crash any more.
I couldn't figure out from the other two threads what the recommended solution was - if someone knows, can they post a sticky thread or something.
xyz123