ReadyBoost is a feature available under Windows Vista. With eBoostr software, Windows XP can also get ReadyBoost feature too. eboostr allows you to use an additional drive (flash memory or hard disk) as another layer of performance-boosting cache for your Windows XP. There is no need to purchase a Vista upgrade to get the benefits of the Vista's ReadyBoost technology. With the newly developed eBoostr, the booting of your OS and applications startup get much faster thanks to the smart caching mechanism.