Changelog:
1. Change software interface
2. Add device drivers removal function to uninstall drivers
3. Support Window XP 64-Bit, Windows 2003 64-Bit and Windows Vista 64-Bit
4. Rewrite device driver update function
5. Improve accuracy of drivers update
6. Fix a bug of memory leak
7. Update unknown devices database and drivers update database
8. Back up drivers of non-present devices
9. Some minor tweaks