Not sure if this has been posted already but For those looking to email to get your Win 10 update, be careful...

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Just days after Microsoft released its latest operating system, hackers have begun targeting soon-to-be Windows 10 users with an emerging kind of malware.Cisco security researchers are warning users against opening email attachments purporting to be from the software giant. The "ransomware" malware, which encrypts files until a ransom is paid, is being sent as part of an email spam campaign.

In a blog post, Cisco researcher Nick Biasini said the attackers are "impersonating Microsoft in an attempt to exploit their user base for monetary gain."

The emails claims its attachment includes an installer that allows users to get the new operating system sooner.
Source: New Windows 10 scam will encrypt your files for ransom