Alex is trying to get rid of Trend Micro antivirus software on his computer, but it won't go away. Leo says these days, antivirus software can't really be removed by a simple uninstall command. It's too embedded in the system. You need to download and install their removal tool, which will custom remove the antivirus software. Here's where you can get it.
Dean installed Norton but he's having trouble with it. Leo says that Windows 10 has Defender built in and it's probably running. Antivirus software won't work well when there's more than one antivirus installed. So Dean should remove the Norton one with the Norton Remove tool. If he has trouble using the removal tool, he should run in Safe Mode with Networking. That will prevent additional drivers from loading and should make it easier to remove it. He should also make sure he uses the right removal tool. Norton has several different ones depending on the utility it is.
Dale is trying to upgrade to Windows 10, but his AVG antivirus software won't let him do it. He's tried to remove it but it still won't let him. Leo recommends going to the AVG website to download their removal/uninstaller tool. He shouldn't reinstall that either, as Windows already has its own antivirus called Windows Defender. If that doesn't work, he may have to back up his data, format the drive, and install Windows 10 from a clean hard drive.