Hello Folks.
This error message showed up recently in my PC.
I had a previous version of Norton 360 and after a license renewal I found that the Norton system information was displaying to me less months than it was supposed to left for a new renewal.
I called Norton and a new install done by Norton Support Tech person over the remote access was done!
Few months later, I realized that my internet connection was starting to hanging down.
I decided to format my PC, reinstall all Windows XP and SP´s and all application software, Norton as well and my data on June 03.
The internet connection and response time improved. PC was faster. Things were going OK.
I did recently all the necessary checks from Norton Diagnostics features on the Norton 360 application, by June 17th. AAccording to the diagnostics file my Norton Version is 20.3.1.22 .
But recently this error 8506,421 message show up, and as if the PC had fixed itself , the message disappeared.
Today this error message showed again, but the message hangs up and I cannot either open the Norton.
Lets see what the Techies will suggest..?
It will sucks to follow procedures to install NPE, run, Reinstall Norton 360 and be ok for a few weeks or months before we migrate to another supplier of Firewall/Anti-Virus,etc