Illustrator blank window keeps opening and closing on start.

[#1]

I just installed Illustrator and this stupid blank window keeps opening and closing, preventing you from using the program at all. What is this thing? How do I get rid of it? 

[#2]

Same thing is happening on PhotoShop. This sucks.

[#3]

Hi Heather,

Sorry to hear about your experience. This seems like sign-in window for Adobe. Please close all your apps. Open Adobe Creative Cloud desktop app. Please sign out if you're signed back in & sign in again. This should help.

If you still have issues, you may follow this help article(https://helpx.adobe.com/in/download-install/kb/cc-sign-in-prompt.html) to resolve this issue.

Hope it helps.

Regards,

Ashutosh