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High CPU use malware
One of my machines has 90% CPU use. Its a windows 10 machine that hadn't been used fr 3 months so I was going through the update process including Norton.
Running task manager I saw that Cortana(?) was using 90% CPU.
Unable to run a scan in normal mode--seems Norton is disabled. Seems Acronis active protection is also off. Suspect malware being used to mine crypto currency but can't find a way to remove.
Have done a complete scan in safe mode but nothing seen yet. Is it this? http://malware.wikia.com/wiki/Tiggre!rfn?
If so how do I use Norton to remove it and why wasn't it caught?
One update that might have hidden malware as Abode Flash player--I did allow it but got no warning.