Very recently I upgraded my system to Win 10. After installing McAfee Antivirus Plus, the Cortana is not working properly (no search result appearing). Please let me know whether this is happened after installing antivirus
Not that I have seen my Cortana searches fine this on Total protection
You can ask either at the Microsoft support or McAfee support if they know of anything
Had another thought when you upgraded To win 10 I assume Mcafee was not installed. that was what I assumed from your post. Was this correct?
If so cortana was working and not after Mcafee.
I have not see how McAfee Antivirus Plus works, but a quick googling showed me that it has a Firewall built-in, with a "Traffic Controller" feature that can change how programs connect to the internet. As a quick test, try disabling the Firewall in McAfee AntiVirus Plus and try Cortana again. If she works, there might be a way to 'trust' the Cortana service in that there "Traffic Controller".
Thank you for bringing this up to us.
Disable McAfee and check whether Cortana is working fine or not.
If not then check with Microsoft support if the latest windows updates has any compatibility issue else reply to proceed.
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