Remove old device drivers that are no longer used in Windows 7

If you find that some recently installed devices are not working properly or often cause the computer to crash, then you can consider deleting old or unused devices in Windows 7. drive.

1. Right click on the Win7 desktop & ldquo; Computer & rdquo;, select “ Properties & rdquo;.

2. On the left panel, find "Advanced System Settings" and click on the "Environment Variables" at the bottom of the “Advanced” tab.

3, in the upper part of the "XX user variable", click "ld"; New & rdquo;

Input variable name: devmgr_show_nonpresent_devices

Input variable value: 1 Finally, click the <;OK” button.

4, right click on the desktop "Computer", select "ldquo; management", open the "Device Manager" on the left side.

5. In the top menu bar of the Device Manager, select “View”——“Show hidden devices”.

6, so you can find "Other devices" on the right side of the device manager.

7, right-click not to use "unknown device", uninstall it!