Weird Malware Infection Upon Upgrading

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not sure up. upgraded windows 10 insider preview through windows update. before upgrade, there no obvious sign of malware infection. upon completing upgrade, found razor web ads installed on system. 100% sure not there before upgrade. kind of cuckoo's egg type attack, , should concerned other more malicious malware or rootkit? i'm running windows defender offline sure. 

eric,

what current situation?

i don't think injection caused upgrade process.

and upgrade process logged in windows setupact.txt log files. may check there see process.

https://technet.microsoft.com/en-us/library/hh824819.aspx

for security part, recommended keep windows defender running.

regards

please remember mark replies answers if help, , unmark answers if provide no help. if have feedback technet support, contact tnmff@microsoft.com.



Windows 10 Insider Preview  >  Windows 10 Insider Preview General



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