Hey Bjorn
I've managed to update my N360 to v5.2, and as there are hardly any posts with updating errors on the Forums, I think that it may be something on your end. I recommend doing the following 3 things (Note: You don't have to do these in the order I give them, and I wouldn't recommend doing these things once only)
1) This may sound really simple and trivial, but it may help you to restart your PC and try run LiveUpdate again. I know I had to restart twice before I was up to date with N360 v5.2. Usually, products may seem up to date, but require a restart to enforce background/hidden updates onto the PC before showing other updates (as updates usually cannot be installed on certain programs while the Registry is being used (i.e. the PC is on))
2) Clear your "waste files". By this I don't just mean the Recycle Bin. There are a lot of junk files which build up over time on your computer, and these are often hard to detect as junk and even harder to clean (since their location is in a folder which is hidden by Windows on default). Fortunately, there are several products out there which can do this efficiently, such as Windows' own Disk Cleanup, CCleaner by Piriform, Advanced SystemCare by IOBit etc
3) If an antivirus product isnt behaving as expected and all the virus scanners are clean, then there could be malware on the system. To detect and remove malware, I personally recommend downloading and installing Malwarebytes Anti Malware on your machine, however there are other ways of dealing with malware listed here: How to TroubleShoot Malware | Norton Forums.
I hope this helps and I hope you get N360 updated soon
Kind Regards,
Dazza-N360
P.S. I apologise if I seem to be talking to you as if you're a kid, I have no idea of how much IT experience/knowledge you have so I had to try explain things as clearly and simply as possible
