It's IE10.0.9200.17357.
I'm installing updates after a clean boot. Every five in date order get installed, then I reboot.
First 15 OK.
For nos. 16-20 (KB3121461 ...) it installs the five, then afterwards reports 'Not needed'.
I'm currently doing a new Check for Updates, which has been running for 25 min so far, so I've just killed it.
I'll reboot now and then check.