Win7 system desktop icon can not be automatically refreshed need to press F5 key how?

The win7 system desktop icon can't be refreshed automatically. How do I press the F5 key?

1. First use the key combination “Win+R” to open the run window and enter the “regedit” option to press the Enter key or OK;

2. After opening the Registry Editor In the menu list on the left, expand: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControl to open the Control file group to be edited. On the Control file group, we use the right click of the mouse, and then select the sub-item in the project from the shortcut menu of the right-click menu. ; item;

3, then create a new project named "ldquo; Update" in the Control file group, then double-click the project and right click on the blank space in the window to the right of the registry list, then continue to create Item, and name this new project "“updatemode”;

4. Next, double-click the updatemode option, then create a new expandable string value, then change its data name to DWORD, and then double-click it. Item, modify the numerical data to “0”