The computer boots fine and your logon screen shows up. You click your username and perhaps enter a password, but then the following happens:
The desktop is entirely black with no start menu at all, however the cursor is visible and the task manager displays using CTRL, SHIFT and ESC.
This issue may have been caused due to a recent update in software or due to a new software installation. Using the automated startup repair or attempting to run system restore will not correct this problem.