I am a long-time Norton user. I have an HP HDX 18t Laptop with Vista Ultimate. I had Norton 360 and Norton Utilities 15 installed.
Due to huge virus corruption and then losing touchpad and keyboard, I decided to upgrade to Windows 8.1. I did a clean install. Then reloaded all my programs. Ran Norton restore to get my files back. I downloaded and installed the newer version of Norton Utilities 16 but couldn't activate it since my key was for version 15. Version 15 doesn't work in Windows 8.1 and so I kept Norton 16. I did not like 8.1 Tile World so I downloaded and installed Classic Shell. I ran Norton Utilities several times without activation. Just recently, I worked up the extra funds to validate/activate my Norton Utilities 16. I ran a registry scan before I shut down. I noticed that it had 23 Registry items to clean. I thought that was due to all the installing/re-installing files and programs.
The next day, I turned on my computer and got a black screen. Not blue--black. I know now I have to take it in for a techie to look at but I am figuring that the Norton Utilities 16 doesn't like or doesn't recognize Classic Shell and dumped the registry files.
I am just giving a heads up about the incompatibility issue I think is going on. The last thing I did was run Norton Utilities 16.
I got a mess on my hands and I will have to put in the shop. This is just FYI.