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Recovery Process
If "Updating the System" is executed before the application of the "Hotfix for Windows x64 (KB921411)", "!" may be
displayed on the USB root hub.
If "!" is displayed on the USB root hub, perform the application of the "Hotfix for Windows x64 (KB921411)" and the
"Updating the System" according to the following process.
1.
Start the Windows Explorer, and click the [Tools] and [Folder Options].
2.
Select the [Files and Folders] - [Hidden files and folders] - [Show hidden files and folders] radio button from
the Advanced settings in the [View] tab.
3.
Check off the following check box in the [Files and Folders] from the Advanced settings in the [View] tab,
and then click [OK].
Hide extensions for known file types
Hide protected operating system files [Recommended]
When the message "You have chosen to display protected operating system files..." is displayed, click [Yes].
4.
Make sure that the files exist.
Open the "<System drive:>\WINDOWS\system32\drivers" directory, and make sure that usbhub.sys and
usbport.sys exist in the directory.
If you can not found them, copy the files according to the following process.
(1) Open "<System drive:>\WINDOWS\system32\dllcache" directory.
(2) Copy usbhub.sys and usbport.sys from the directory noted above to
"<Systemdrive:>\WINDOWS\system32\drivers".
5.
Restart the system.
6.
Refer to [Application process of the Hotfix (KB921411)] and apply the "Hotfix for Windows x64
(KB921411)".
7.
Refer to [Application process of "Updating the System"] and execute "Updating the System".
8.
Restart the system.
With that, the process is finished.
E-11
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