Have you received a call from 866-748-4393? Was it safe or suspicious? Help us build a safer community by sharing your experience with others.
claiming to be Microsoft Security Helpline
Receiving unwanted or harrassing calls from (866) 748-4393? Report It! You can also add your number to the National DO Not Call Registry by visiting their website or calling (888) 382-1222, but many people have complained about it not being effective. If there is something requiring an immediate attention, please contact your local law enforcement agency or call 911.