windows defender error code 0x80016CFA wants me to contact microsoft cert. tech 1-888-905-1062 to immediately rectify issue

Is this real? If not how to fix please?

BSOD: dll Registry Settings has detected the error code 0x80060402

system error warning-google chrome

It says please do not shut down or restart computer to prevent data loss and registry issues.

stop: 0x0000007B inaccessible boot device

error code while starting windows defender due to malware activity

windows defender timeout error code 0x000B0043

error code 0x800610A3 unauthorized access to registry dll


No, that's a scam. Don't call that number.


You can use the Task Manager to close your browser: How to Use the New Task Manager in Windows 8 or 10

After a reboot  the pop-up should be gone.

If not, please follow the steps provided here: Remove Tech Support Scam pop-up (Call For Support Scam)



May 4, 2018: I won't participate anymore in MC. Enough is enough.

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Question Info

Last updated January 23, 2019 Views 35,831 Applies to: