You experience problems when you try to mount VHD files by using the Vhdmount.exe tool after you apply update 948515 in Virtual Server 2005 R2 SP1

Symptoms
You applyupdate 948515 on a computer that is running Microsoft Virtual Server 2005 R2 Service Pack 1 (SP1). After you do this, you experience problems when you try to mount Virtual Hard Disk (VHD) files by using the Vhdmount.exe tool.
For example, if you run the vhdmount /m vhd file command or the vhdmount /p vhd file command, you may receive the following error message:

The specified operation could not be completed as an unexpected error has occurred.
Resolution
This issue occurs because the Vhdstor.sys driver is not successfully upgraded to version 1.1.623.0 after you install update 948515.

Stop error when you resume a Windows Vista-based computer that is connected to a USB optical disc drive from standby “STOP: 0x000000E4″ or “STOP: 0x0000000A”

Symptoms
When you have a Windows Vista-based computer that is connected to a USB optical disc drive, andyou resume the computer from Standby, you may receive a error message that resembles one of the following error messages:

STOP: 0x000000E4 (parameter1, parameter2, parameter3, parameter4)

STOP: 0x0000000A (parameter1, parameter2, parameter3, parameter4)NotesThe parameters in the error message vary, depending on the configuration of the computer. This issue may occur on a computer that is running Windows Vista, Windows Vista Service Pack 1 (SP1), or Windows Server 2008.Not all “0x000000E4″ or “0x0000000A” Stop errors are caused by this problem.
Resolution
This issue occurs because of a race condition in the Usbstor.sys component.