HELP! Computer keeps refreshing and taskbar is missing!

soysauce2001 you will need to roll back the update on your PC, once you have logged in, press ALT+CTRL+DEL , this will take you to a black screen with some options on it, at the bottom right hand side of the screen hold down the SHIFT button and click on the power button on the screen and select "restart".
This will take reboot your computer to a recovery options menu, then from there click "advanced" then "uninstall updates" then "Uninstall feature update" this will remove the latest update from your computer, your pc will reboot a few times during this process so leave it to run until you are taken back to your login screen. Once you have logged back in your task bar should be back and working.

Source: I have this same exact issue myself with the latest update.