Why won't my 64Gb SanDisk Extreme 3.0 let me enable ReadyBoost with it?

  I have windows 7 64bit and Windows 10 64bit. I have gotten it to work on Windows 7 once but have not been able to get success this time around. What am I doing wrong, and is it even possible for it to work with Windows 10?


i would like to inform you that not all sandisk drives work with ready boost and even if you think that its enabled it will make no difference at all in the system. Furthermore it will wear out the drive and it will be defective in a very short time. 

Also it will not be covered in warranty since it is not a recommended use by sandisk