From Symantec:
Please be aware that this issue can occur if the Symantec Redirector is not
updated in your computer. I suggest that you please update Symantec
Redirector in your computer. Symantec Redirector (Symredir) is a set of
shared network drivers that allow Norton AntiVirus and other Norton products
to filter incoming and outgoing data for malicious or undesired content.
The Redirector intercepts data coming into, or leaving your computer, and
redirects it to a temporary location on your hard drive where it processes
the data, and then sends the data to its intended destination. For
information on this subject, please refer to the document provided below
that will assist you in updating Symantec Redirector files in your computer.
Please click on the link provided below to view the document:
Title: 'How to update the Symantec Redirector files'
Document ID: 2002051610084213
Web URL:
http://service1.symantec.com/Support/sharedtech.nsf/docid/2002051610084213I also suggest that you please update Symevent files in your computer.
Several files make up the module known as Symevent. Symevent is used by many
different Symantec programs in all versions of Windows and is updated
periodically. Symevent files are low-level drivers that are used by many
different Symantec programs in all versions of Windows, and they are updated
periodically. When you install current Symantec software, these files will
normally be updated. For information on this subject, please refer to the
document provided below:
Title: 'How to update the Symevent files'
Document ID: 1998081213371213
Web URL:
http://service1.symantec.com/Support/sharedtech.nsf/docid/1998081213371213If you take Norton OUT of the msconfig start-up list whilst in safe mode you should then be able to boot to the desktop and remove and re-install the program.
I use AVG Free Home Edition after having too many problems with Norton.
Which version of NAV do you have?
Is there a virus on any of your USB keys?