Crashes after update

My laptop did an update over the weekend and ever since it's been rebooting constantly and running really hot. Looking at task manager, service host is hogging 80% of the CPU even when idling. I've tried disabling Superfetch and also changing the NDU value in the registry. I've even tried rolling back the update, still no joy though. Any ideas?<br><br>Thanks

Would it be possible to format and clean install? That's what I would do if I had these symptoms on my system. These windows 10 updates can be a nightmare!