I have recently purchased a new Windows 11 computer pre-installed with Office 2021. Having installed Norton 360 and then transferred my Outlook data I opened Outlook for the first time. All seemed fine until I tried to re-open Outlook some time later. At this stage it appeared to refuse to open but after a number of attempts Outlook opened with a message to say that the Norton Antispam Add-in was crashing the program and had been disabled. It appears to be working OK now but, of course, without the ability to cull spam. Does anyone have any ideas or is this Norton not up to speed with the new version of Office?