This problem has been going on for a while on my wife's PC which is a Sony Vaio running WIn7 Home Edition. I have uninstalled and reinstalled the product several times as per https://support.norton.com/sp/en/us/home/current/solutions/v80281719_EndUserProfile_en_us, but within a week or so the problem comes back and Norton is rendered useless and provides no protection. On some occasions when I completely shut down the PC and start it up the error will go away.I use a Lenovo Thinkpad and have not experienced a similar problem.
This problem has been reported in this community for quite a while, but Norton seems unable to fix the problem, which appears to be a flaw in the software. I have been a Norton customer for years and I would hate to have to switch.
A permanent solutions would be appreciated.