Recent, New Doc and notifications aren't displaying properly. Why??

Hi, all. I'm a PC user running Windows 10 and this issue has been going on for the last several Adobe updates. I've also tried un-/re-installing illustrator without any success to fix the issue.

Illustrator only shows about 7/8 of the first screen upon opening: Recent documents. The display is anchored at the top left corner of my screen and then cuts to black 7/8 across and 7/8 down my screen.

Next, when I choose "Create new" I'm given a screen that also doesn't show all it should. In the header I see Recent, Saved, Mobile, and Web. I believe the other options should be Print, Film & Video, and Art & Illustration but it doesn't display those because the window is too small. Below that, I see "Let's start something new. Start with your own document settings or from a range of dc... [it gets cut off]... to get working quickly." I do not have the option of scrolling under "YOUR RECENT ITEMS (7)" and can only see 3 of the supposedly 7 options there.

Finally, the pop-up notification to update Illustrator displays partially as well. My only option is to click "Remind me later" though I can see part of the rounded blue "update" button.

I'll try to post some photos. Anybody know what might be the root cause of all this?? It's been driving me crazy!