Running Norton Security, Version 22.5.4.24. Had what I thought was network issues and spent 1 1/2 hours on phone / chat with internet provider. No luck. I took their suggestion and ran Malewarebytes and found TrojanDNSchanger. Removed the virus and all okay. Can someone tell me how this slipped through the cracks at Norton? I have never, ever had a problem with Norton and use this product exclusively for my clients. Now I am a bit concerned.