I installed 18.04 LTS on my brand new msi laptop and after login, my computer (mouse) is frozen and nothing happens. I am very disappointed about the quality of the new OS.
I’ve moved this to the https://community.ubuntu.com/c/support-help-requests category because this site isn’t designed to take tech support questions. Sorry. I’d recommend using one of the official support channels listed on the https://community.ubuntu.com/t/finding-help/712 page.