Skip to main content

Improves USB Drive Performance in Windows 7

Microsoft has released a hotfix for Windows 7 and Windows Server 2008 designed to boost performance and speed of USB storage devices such as Flash drives and USB hard disks. The hotfix KB2581464 introduces a new feature in the aforementioned operating systems that enables you to increase the maximum transfer size of USB storage devices from 64 kilobytes (KB) to 2 megabytes (MB). According to Microsoft, this can improve performance for some USB storage devices.

The update will not be served through Windows automatic update service, and is only available for download from Microsoft Support website.

After you install this update, to increase the maximum transfer size of USB storage devices, follow these steps:

  1. Click Start, type regedit in the Start Search box, and then press Enter.
  2. Locate and then click the following registry subkey:

    VVVV represents device descriptor idVendor in hexadecimal.
    PPPP represents device descriptor idProduct in hexadecimal.

  3. Click Edit, point to New, and then click DWORDValue.
  4. Type MaximumTransferLength, and then press Enter.
  5. Click Edit, and then click Modify.
  6. In the Value data box, type a value to specify the maximum transfer size between 64KB and 2MB. For example, you select Decimal and type a value between 65535 (64K) and 2097120 (2M).
  7. Exit Registry Editor.

Although the hotfix is supported by Microsoft, users are advised to apply this hotfix only to systems that are experiencing problems with USB storage drives. If you are not severely affected by this problem, Microsoft recommends that you wait for the next software update that contains this hotfix.

Additional information and download link for the hotfix is available on this page.


  1. Says "Not applicable to my computer".

  2. Maybe you should ask Microsoft support. They have a help forum for troubleshooting.

  3. I don't have such a key especially I don't have "VVVVPPPP" from the "usbstor", obviously after installing the Windows6.1-KB2581464-x86" fix!
    And by the way... was it so difficult for you to mention the whole registry path instead of telling us to "locate" the respective registry subkey?!


Post a Comment

Popular posts from this blog

How to Record CPU and Memory Usage Over Time in Windows?

Whenever the computer is lagging or some application is taking too long to respond, we usually fire up task manager and look under the Performance tab or under Processes to check on processor utilization or the amount of free memory available. The task manager is ideal for real-time analysis of CPU and memory utilization. It even displays a short history of CPU utilization in the form of a graph. You get a small time-window, about 30 seconds or so, depending on how large the viewing area is.

How to Schedule Changes to Your Facebook Page Cover Photo

Facebook’s current layout, the so called Timeline, features a prominent, large cover photo that some people are using in a lot of different creative ways. Timeline is also available for Facebook Pages that people can use to promote their website or business or event. Although you can change the cover photo as often as you like, it’s meant to be static – something which you design and leave it for at least a few weeks or months like a redesigned website. However, there are times when you may want to change the cover photo frequently and periodically to match event dates or some special promotion that you are running or plan to run. So, here is how you can do that.

Diagram 101: Different Types of Diagrams and When To Use Them

Diagrams are a great way to visualize information and convey meaning. The problem is that there’s too many different types of diagrams, so it can be hard to know which ones you should use in any given situation. To help you out, we’ve created this diagram that lays out the 7 most common types of diagrams and when they’re best used: