Hi ThundY,
I am Dave, I will help you with this.
ReadyBoost was a technology that was introduced in Windows 7 for PC's that had very little RAM and to be honest, it never really worked and never helped to speed up a PC.
If you have an SSD drive on your PC, then ReadyBoost will not be available on your PC, because data access on an SSSD is many times faster than USB access and Windows will block ReadyBoost and use virtual memory on the SSD instead.