Volume Shadow Copy Service error on Windows Server 2012

In many instance of Window Server 2012, there are lots of errors in Event Log about Volume Shadow Copy Service like this:
Volume Shadow Copy Service error: Error creating the Shadow Copy Provider COM class with CLSID {463948d2-035d-4d1d-9bfc-473fece07dab} [0x80070005, Access is denied.].
Operation:
Creating instance of hardware provider
Obtain a callable interface for this provider
List interfaces for all providers supporting this context
Query Shadow Copies
Context:
Provider ID: {3f900f90-00e9-440e-873a-96ca5eb079e5}
Provider ID: {3f900f90-00e9-440e-873a-96ca5eb079e5}
Class ID: {463948d2-035d-4d1d-9bfc-473fece07dab}
Snapshot Context: -1
Snapshot Context: -1
Execution Context: Coordinator

Actually, that may be a bug of Windows Server 2012. You need to and are able to correct it manually by setting up the right credential for related DCOM. You can choose UI or PS to reach that:
UI mode:
1 Open Component Services, open Computers – My Computer – DCOM Config.
2 Locate WTVdsProv and press right mouse key – Properties – Identity, select This user, enter an account name and password with local administrator’s permission.
3 Do the same step for WTSnapshotProvider.
PS mode:
Open PowerShell and use these commands:
$PsCred = Get-Credential
$PrvdIdentityPath = New-Object System.Management.ManagementPath(“root\wmi:WT_iSCSIStorageProviderIdentity”)
$PrvdIdentityClass = New-Object System.Management.ManagementClass($PrvdIdentityPath)
$PrvdIdentityClass.SetProviderIdentity(“{88155B26-CE61-42FB-AF31-E024897ADEBF}”,$PsCred.UserName,$PsCred.GetNetworkCredential().Password)
$PrvdIdentityClass.SetProviderIdentity(“{9D884A48-0FB0-4833-AB70-A19405D58616}”,$PsCred.UserName,$PsCred.GetNetworkCredential().Password)

Source: http://blogs.technet.com/b/filecab/archive/2012/10/08/iscsi-target-storage-vds-vss-provider.aspx

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