We have our DPM 2012 R2 installation on Windows 2008 R2 servers. We encounter failures some of the time on our Full Express Backups on Friday evenings where we get VSS errors in the event logs. 

Event 12298

Event 12289

We haven't encountered these issues until recently. Is there any idea on how to remedy these. I just installed DPM 2012 R2 this week so I am hoping it helps. But does anyone know if there is a hotfix or something for this in case it does not. I read about these events having a hotfix for Windows 2003 servers but not Win2K8?

Event 12289

Volume Shadow Copy Service error: Unexpected error DeviceIoControl(\\?\Volume{XXXXXXX]).  hr = 0x80070057, The parameter is incorrect.
. 

Operation:
   Processing EndPrepareSnapshots

Context:
   Execution Context: System Provider

Event 12298

Volume Shadow Copy Service error: The I/O writes cannot be held during the shadow copy creation period on volume \\?\Volume{XXXXXXXXX}\. The volume index in the shadow copy set is 0. Error details: Open[0x00000000, The operation completed successfully.
], Flush[0x00000000, The operation completed successfully.
], Release[0x00000000, The operation completed successfully.
], OnRun[0x80042314, The shadow copy provider timed out while holding writes to the volume being shadow copied. This is probably due to excessive activity on the volume by an application or a system service. Try again later when activity on the volume is reduced.
]. 

Also:

Event 12310

Volume Shadow Copy Service error: The shadow copy could not be committed - operation timed out. Error context: DeviceIoControl(\\?\Volume{xxxxxxxxx} - 00000000000001C4,0x0053c010,0000000000619C70,0,000000000061AC80,4096,[0]). 

Operation:
   Committing shadow copies

Context:
   Execution Context: System Provider