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NSBU.EXE running CPU at 100%
I have two computers both of which run Windows 10 at the latest fix level and Norton Security also at the latest level.
On the Lenovo Y460 Norton Security seems to work just fine and rarely uses much CPU.
On the Lenovo X1 Norton Security seems to work well for all tasks but when level unused will often start consuming 100% of CPU, the CPU usage by NSBU.EXE 30% plus. The computer is then very unresponsive but after a mouse click and a wait of 10 seconds or so the CPU drops to normal usage levels of around 5-10% as norton stops its background work. Now I know Norton Security is running optimization tasks when it is idle but why 30%+ CPU. I have tried reinstalling using the NRNR.Exe which results in no change in behaviour. I have tired turning on and off "Idle time optimizer" and "Performance Monitoring" and this seems to have no effect. This is really annoying.
Any suggestion welcome.