Win7 boot black screen only mouse on the screen solution

After using the computer for a while, there will be problems like this. In the win7 system, after the boot, the black screen, and only the mouse arrow on the screen, what should I do? The solution is simple, the detailed steps are as follows.
win7

1. Press the keyboard Ctrl+Alt+Del at the same time (of course, before this step, first make sure the computer is connected to the keyboard), select “Start Task Manager” in the list” , this will pop up "Task Manager", use the mouse to click the menu in the upper left corner "Files" - "New Tasks", in the pop-up "Create a new task" dialog box, enter "ldlor;" Click “OK", this is the normal display of the system's desktop, which completes the first step, complete the following steps.

2. Click the “Start” button in the lower left corner of the screen, enter “ldedit” in the text box, press enter to enter the registry, and then expand the registry options:

HKEY_Local_MachineSoftwareMicrosoftWindows NTCurrentVersionWinlogon, (click on the corresponding item with the mouse to expand its sub-items, find the corresponding option in the sub-item, and then find the Winlogon item in turn).

Locate the winlogon item, click with the mouse, find the ”Shell” item in the list on the right side of the screen, right click on it, in the drop down menu, select “Modify “, in the popup In the "Edit String" dialog box, delete the contents of "Digital Data" and "explorer.exe", click OK, and close the registry.

At this point, the problem should be completely solved. In addition, the problem is caused by a virus, please check the computer.