RE: Dell Inspiron 7559 high Memory
There is no need to wait until the battery runs down to turn off a frozen laptop nowadays. Simply hold down the power button until it shuts off. It will take 30-40 seconds.
You can uninstall updates if you think there is a bad update. Open Settings, Update, Advanced Options, View update History, Uninstall updates. Not all updates can be uninstalled but some can. You should also check the Event Viewer for clues as to what might be hanging up the computer.