Or not. There's actually a very simple Windows tweak that keeps open folders open, even after a reboot. It's like giving Windows the gift...of memory. Here's how to enable the setting:
1. Click Start, type Folder Options, and then hit Enter. (XP users can find Folder Options in the Control Panel.)
2. Click the View tab.
3. Scroll down until you find Restore previous folder windows at logon, then click the checkbox to enable it.
4. Click OK and you're done!