Win7 Ultimate system after the boot black screen only how to solve the mouse

1, after entering the windows7 system, press the "Ctrl+Alt+Del" key on the keyboard to open the task manager;
2, in the open task manager , click “file——New Task", enter the “explorer” command in the pop-up "New Task" window and click OK;
3, although this time successfully entered the desktop, in order to thoroughly To solve the black screen failure, you need to continue to operate. Press “ld+;win+r” to open the running window, press “Enter” and press “Enter”;
4. In the pop-up Registry Editor, expand the following registration item HKEY_Local_Machine. \\Software\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon;
5. Locate and double-click the "shell" item in the list on the right, and change the data value to "explorer.exe" in the edit string window that opens. , then click OK to save and exit the registry. can.