Cannot update UbuntuUnity 20.04

I install UbuntuUnity 20.04 and use it with no problems. When I go to update it and I reboot then thee problem is here. It reboots to a black background with different icons. If I move the mouse on the Desktop everything starts fluttering and nothing will open, no matter how many times I reboot or reinstall. Dell x64. 4 core cpu 16 gb ram.