New to Ubuntu and just installed 19.10 earlier today. I installed it using a USB drive and have it set up for dual boot. Windows and Ubuntu both start up fine with no problems. During setup it was also incredibly slow, and I set the partition to have 100gb. It would take several seconds for any input or action to happen. For example, Firefox would open fairly quickly but took several seconds before it registered me clicking on it
Eventually I also noticed that it would not let me connect to the internet through wifi. I have 8gb ram on a 64bit AMD processor.