How to TURN OFF auto start of OUTLOOK (NEW) on computer?

Hello Selene, Thank you for reaching out to Microsoft Community. My name is Abu, I'm happy to assist you, hopefully, I will do so to the best of my knowledge. I'm sorry to hear about the trouble you're experiencing with the Auto Start of Outlook(New). I understand how frustrating this situation is for you. Kindly note that this is a user-to-user forum, we are users helping other users, and we aren't Microsoft employees. To Turn Off the auto start of Outlook ( New) Using Task Manager on your Computer 1. Right-click on the taskbar on your computer and select Task Manager. 2. Go to the Startup tab. 3. Find Outlook in the list Right-click on "Enabled" and click "Disable" to disable it from automatically starting This should automatically stop Outlook from opening when you start your computer If you have any questions, please let me know I will be more than happy to help you further. Give back to the Community. Help the next person who has this issue by indicating if this reply solved your problem. Click Yes or No below. Regards Abu

I had the same problem but it wasn't just on start up. If I stepped away from the computer for a bit, I would return to 3 or 4 open tabs of Outlook. None of the solutions suggested here worked. I didn't try the registry solution (way above my limited skill set) but I tried all the others without success. I did however notice something in Settings/Apps. My problems began when I was obligated to switch to New Outlook and I saw two Outlook icons in Apps. I uninstalled the old one, restarted my computer and that solved my problem. That was 3 days ago and Outlook hasn't popped up once since then...I hope this helps.

I have New Outlook running ok. However, when I boot my computer, Outlook 2016 starts also. When I look in Task Manager > Startup, Outlook (2016) is NOT running, so I cannot disable it. If I remove the outlook.pst that it tries to use, Outlook 2016 complains it can't find the file. I cannot find any startup list that says to start Outlook. What causes Outlook 2016 to start?

Could you specify which Key in \SOFTWARE\Microsoft\Office\16.0\Outlook\Preferences we should change the value from 1 to a 0?

Disabled Newoulook in the registry

change the value from 1 to 0

Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Outlook\Preferences

I don't use office (unless forced LOL) and they'd better not start charging me for this forced change to outlook. I'll bail so fast their heads will spin.