Turn ReadyBoost on or off for a storage device, Vista
can use storage space on some
removable media devices, such as
USB flash drives, to speed up your computer. When you insert a
compatible device, the AutoPlay dialog box will offer you the option to
speed up your system using Windows
Plug a flash drive or other removable media device
into your computer. This should automatically open AutoPlay.
If AutoPlay does not open, it might have been
disabled. For more information, see
Troubleshoot AutoPlay problems.
Under General Options, click
Speed up my system.
This will display the Properties dialog box for your
flash drive or other removable media device.
Click the ReadyBoost tab,
and then do one of the following:
To turn ReadyBoost off, click
Do not use this device.
To turn ReadyBoost on, click
Use this device, and then move the slider to choose how
much of the available space on your flash drive you want to
reserve for boosting your system speed.
Move the slider to choose how much space you want to
designate for boosting your system speed