This number was not the problem. Ignore my earlier comment.
Bogus automated call supposedly from Microsoft Support that your computer has been compromised,
FTC Data
At least 2 consumers from Texas reported phone number 512-673-6780 to the Federal Trade Commission. 50% of complaints reported the call or text message as a robocall or recorded message. The last complaint was on April 24, 2018.
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Help others by rating this number - was it spam, a business, or something else?
One of a RASH of Spoofed phone numbers that CALL my cell DAILY. Always from Texas and MOST ALL from Houston, or Houston exUrbs.