a solution like the following:
One, the simplest, restart the computer, into the system black screen is only an occasional problem.
Second, restart the computer, the start of the time even press F8 key into the safe mode to see can go in no, just reboot before the problem of the software and what to cancel the start or delete, if it is to kill soft, decisively deleted.
Third, the boot black screen to the start login, but can see the mouse
First press the keyboard Ctrl+alt+del (before this step, the first to ensure that the computer is connected to the keyboard), select "Start Task Manager" in the list, this will pop-up "task Manager",
Click on the top left corner menu "File"-"New task", the following figure:
In the Create New Task dialog box that pops up, enter "explorer" point "OK"
This is the normal display of the desktop on the system.
Hurry up and restart the suspicious things by adjusting them as described above.
Four, toxic, safe mode of computer for drug search or hanging on other machines to antivirus and then take back.
Five, the ultimate way, reload the system!