just got windows 10 which has Defender. I have used the AVG Anti Virus professional edition for the past 10 years or more. This is due for renewal in a couple of months time. Which gives the better protection AVG or windows own Defender
Not defender, being a Microsoft product it has to comply with numerous standards that a normal user never uses, some of these things produce additional vulnerabilities. It can be improved by adding defender control panel but its not worth it.
AVG hasn't been a robust protection for a number of years.
Kaspersky is really good and the best way of implementing that is by using "Zonealarm Free Antivirus + Firewall" which incorporates Kaspersky. Only criticism is that it slows things down a little but full protection is always going to have an overhead.
As with all these things you have to be very careful when updating that you don't accidentally agree to upgrades or trials.https://www.av-test.org/en/antivirus/home-windows/windows-10/october-2016/