If Opera's taskbar button disappears too, you might be experiencing https://www.reddit.com/r/operabrowser/comments/j5fstq/opera_opera_gx_not_opening_or_opening_and_closing/.
If Opera's taskbar button remains, try hitting Windows Key + D.
Do more on the web, with a fast and secure browser!
Download Opera browser with:
- built-in ad blocker
- battery saver
- free VPN