USB Driver for Nexus 5 on Windows 7

When I plugged in my Nexus 5 to my Windows 7 PC, it was not recognised, even after I used the Android SDK Manager to install the latest Google USB Driver. I finally worked out that there is a manual step you must take: Check the tooltip to find out where the USB driver was downloaded to (I found one under Program Files folder that was not installable – make sure you refer to the tooltip), and use Device Manager to update the driver, pointing to this folder. Then you can debug on your Nexus using ADB.