Error 8506,421 on 2 new laptops running Win7 and 1 old desktop running Win Vista

Norton Security | Norton Internet Security
1

Anyone fix the 8506,421 error when running Norton 360?

 

20.2.0.19  is Norton version.(latest)

All windows updates are installed on both Win 7 laptops and Vista desktop.

2

Anyone fix the 8506,421 error when running Norton 360?

 

20.2.0.19  is Norton version.(latest)

All windows updates are installed on both Win 7 laptops and Vista desktop.