Norton Live Update

Hello.

I am running Windows 7 x64 SP1 Pro.

I use Norton Internet Security with backup ten (10) devices.

Around 4th of April 2016 I noticed problems with live update.

It would just hang and cause a huge r.a.m. lag during backup.

So I left it for a couple of hours, read a it came back and it had not installed the downloaded updates.

So I forced reboot (pressing restart button) and same thing.

So I restored an image to 2nd of April 2016, first updates where fine, then second, then lag again and no updater working o.k.

So I cleaned up my temp files, defraged, cleaned up again and same story.

So this morning I restored an image to 27th of March 2016 and same story.

I have a feeling live update is downloading something that is corrupting and causing me grief.

Any ideas on a solution, thanks in advance,

Lee