We have been using an old version of NAV on dedicated hosted web servers. Recently we have realized that NAV was triggering ThreadAbortException on long running ASP.NET pages. Excluding files did not solve the problem. We have had to upgrade NAV.
We have installed NAV in unmanaged mode on these servers as per the documentation, but after a couple of days, we have realized that scheduled scans were not working. The reason is explained here.
The workaround which is not given in the Symantec knowledge base is simply to copy (export + import) the following registry keys (and all subkeys) from a computer which has NAV in managed mode to the computer which has NAV in unmanaged mode: