Win7 System mouse wheel failure How to do

1. Right-click the computer icon on the desktop and choose "Manage";

2, in the window interface, click on the left of the "Device Manager";

3, expand the mouse and other pointing device, select Uninstall the following "Hid-compliant Mouse", and then restart the computer.

Method Two:

1, press Win+r key, open run, enter regedit, return, enter Registry Editor;

2, expand to Hkey_current_usercontrol paneldosktop, on the right to find and double-click to open "WheelScrollLines", the data value modified to "3", click OK to save;

3. Restart the computer after the setup is complete.