There are a few ways to find the device manager in Windows 7.

1. Click the Start button -> Control Panel -> System and Security -> click System and the Device Manager link appears in the left pane:

2. Click the start button and in the search box type devmgmt.msc and click Enter

3. Type “device manager” in the search box and the link will appear under “control panel” right above the search box, then all you have to do is click that link and the device manager will appear.