Usbstor.sys – Pre Service Pack 2 Revision History for Windows 7 SP1, Windows Server 2008 R2 SP1 and Windows Small Business Server 2011 (SBS 2011)

03-Sep-2011 – 6.1.7601.21810 – Usbstor.sys – x86/x64 – http://support.microsoft.com/kb/2496290 – “ERROR_IO_DEVICE” error message when you use the DeviceIoControl function together with the IOCTL_DISK_IS_WRITABLE control code in Windows 7 or in Windows Server 2008 R2

03-Sep-2011 – 6.1.7601.17684 – Usbstor.sys – x86/x64 – http://support.microsoft.com/kb/2496290 – “ERROR_IO_DEVICE” error message when you use the DeviceIoControl function together with the IOCTL_DISK_IS_WRITABLE control code in Windows 7 or in Windows Server 2008 R2

15-Jul-2011 – 6.1.7601.21771 – Usbstor.sys – x86/x64 – http://support.microsoft.com/kb/2581464 – An update to increase the maximum transfer size of USB storage devices in Windows 7 or in Windows Server 2008 R2

15-Jul-2011 – 6.1.7601.17650 – Usbstor.sys – x86/x64 – http://support.microsoft.com/kb/2581464 – An update to increase the maximum transfer size of USB storage devices in Windows 7 or in Windows Server 2008 R2

11-Mar-2011 – 6.1.7601.21680 – Usbstor.sys – x86/x64 – http://support.microsoft.com/kb/982018 – An update that improves the compatibility of Windows 7 and Windows Server 2008 R2 with Advanced Format Disks is available

11-Mar-2011 – 6.1.7601.17577 – Usbstor.sys – x86/x64 – http://support.microsoft.com/kb/982018 – An update that improves the compatibility of Windows 7 and Windows Server 2008 R2 with Advanced Format Disks is available