Helle experts - your help is needed.

I did install NIS2007 and all was going well. One week or so...
Then I got the error-message: "An internal error is occured. error 5202,2. Please re-install NIS 2007.

I did remove NIS2007 and install again - same error. I did use the removal tool and installed again - same error. I did try the liveupdate with the latest version that I did dl from Symantec - did not helps.

I have not a idea what I have to do...

System (behind a NAT router):
Vista Ultimate 64, Vista frewall enabled, Windows-Defender running, IE64 is the standard browser. Thatīs all.