Windows 7 - USB Installation Problems

The problem



A lot of the USB problems on Windows Seven are caused by uninstalled drivers that do not show up in device manager.



The Solution




General USB problems


Click on start orb, Type, "Advanced System settings" (without the ") in the search box and click to go there.


Click on Advanced tab, Click on Enviroment Variables.


Under the window System variables click on New.


Type " devmgr_show_nonpresent_devices" (without the ") as the variable name and type 1 as the value.



Click ok 3 times to close the windows.


Click on start orb, Type "Device Manager" (without the ") in the search box and click to go there.


Click on View, Click on Show hidden devices.


Now you can uninstall all old and unknown USB devices.




Open windows Explorer, Click on Computer in the menu bar. Type "infcache.1" (without the ") in the search bar and delete it when it is found.


If the USB device still does not work remove all USB devices and then uninstall the USB controller(s) followed by a new start.