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General Information

ReadyBoost uses the Superfetch service and an USB flash drive or memory card as memory cache and performs boot optimization. If you do not use an USB flash drive in this manner, you can disable ReadyBoost, but a negitive impact on performance could result, depending upon the amount of memory installed. I recommend to leave the Superfetch service on Automatic.

Windows Vista

Default Description

Provides support for improving system performance using ReadyBoost.

Additional Information

None at this time.

Default Startup Type

Vista Home Basic Automatic (Started) Automatic (Started) Automatic (Started)
Vista Home Premium Automatic (Started) Automatic (Started) Automatic (Started)
Vista Business Automatic (Started) Automatic (Started) Automatic (Started)
Vista Ultimate Automatic (Started) Automatic (Started) Automatic (Started)
Vista Enterprise Automatic (Started) Automatic (Started) Automatic (Started)

Service Names

Service Name (registry): EMDMgmt
Display Name: ReadyBoost

Default Path and Command Line Options

C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted

Log On As

Account: Local System Account


What service ReadyBoost needs to function properly:

What other service require ReadyBoost to function properly:

  • None (HB, HP, B, U)

Additional Reading

More information on these features is located here:

Performance tests conducted with ReadyBoost and Superfetch are located here:

The recomended amount of ReadyBoost is between 1 and 3 times the physical RAM installed in the system. More information is here: