When i had problem, i make backup and reinstall win10 and formating C:\. First reinstall antivirus and scan may backup for the first time and.found malwares that before didn't found. Afetar a week, the.problem.occours.again. so I realized after that my wife mobile was infected and it was.possivel spreadimg by wifi. So i had to restore all.mobiles and format PC again. After this the problem was fixed.