Windows shortcuts have the power to launch File Explorer and have it start off in the directory of your choice. Here's how:
1. Right-click any open spot on the desktop and choose new shortcut. You’ll get a properties dialog like the one in the screenshot.
2. In the Target box, type explorer.exe followed by the switches that tell explorer to open the right way, in the right place. There's a full list of valid switches in Microsoft's KB 152457. In this case, I want explorer to start "rooted" at the location
C:\Users\Woody\Documents\Invoices. I type:
3. Click the general tab and give the shortcut a name. You can also click the change icon button on the shortcut tab and pick a different icon. When you're done, click OK.
4. Click on the icon and drag it to the start button. When the start menu unfolds, drop the icon onto the top of the left side of the start menu.
5. If you want a metro tile on the right side of the start menu, drag the new start menu item over to the right. If you want a taskbar icon to match, right click the start menu item and choose 'pin to taskbar.'