Question Regarding Windows Firewall Protector for 8.1 on New PC Build

Pure Michigan

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Dec 5, 2014
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I just got my new pc built and have downloaded/installed Avast! and Malwarebytes free versions. Do I need to keep my "windows firewall" on? I have been getting google flagged as a "dangerous" site and wonder if this is the windows firewall. Is it necessary to keep the firewall on if you have solid AV and malware protection? I do not plan on downloading any shady stuff or visiting naughty websites by the way. Thank you!

Also, anyone have experience with AdBlock free version for stopping unwanted pop ups?