Check the event log for failure events logged by Windows Server Backup.

1. How: Open Event-Viewer and review at the logs at: Windows Logs\Application where the source is Backup.

2.Identify which application or layer caused the issue.
·How: The event in previous step will usually indicate which layer or application caused the failure. For example, where VSS is the cause, you will see a message such as Check VSS event log for details.” .Check the event log of the problem application reported by the failure event.

3.Analyze events belonging to the application to understand the root cause. The events may point to issues in a different application.
·How: Search for events logged by the application found in step 2. For example, for errors caused by I VSS, this means, searching for all events where the value in the Source column is VSS.

Error #(0X80042302)

Log Name: Application
Source: VSS
Date: 4/21/2011 7:40:37 PM
Event ID: 22
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: as83
Description:
Volume Shadow Copy Service error: A critical component required by the Volume Shadow Copy service is not registered. This might happened if an error occurred during Windows setup or during installation of a Shadow Copy provider. The error returned from CoCreateInstance on class with CLSID {faf53cc4-bd73-4e36-83f1-2b23f46e513e} and Name VSSEvent is [0x80040154, Class not registered].

Operation:
Gathering Writer Data
Executing Asynchronous Operation

Context:
Execution Context: Requestor
Current State: GatherWriterMetadata
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="VSS" />
<EventID Qualifiers="0">22</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2011-04-22T02:40:37.000000000Z" />
<EventRecordID>20580</EventRecordID>
<Channel>Application</Channel>
<Computer>as83</Computer>
<Security />
</System>
<EventData>
<Data>{faf53cc4-bd73-4e36-83f1-2b23f46e513e}</Data>
<Data>VSSEvent</Data>
<Data>0x80040154, Class not registered
</Data>
<Data>

Operation:
Gathering Writer Data
Executing Asynchronous Operation

Context:
Execution Context: Requestor
Current State: GatherWriterMetadata</Data>
<Binary>2D20436F</Binary>
</EventData>
</Event>


Solution: Run CMD as Administrator!

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Users\Administrator>sfc /scannow

Beginning system scan. This process will take some time.

Beginning verification phase of system scan.
Verification 100% complete.

Windows Resource Protection found corrupt files and successfully repaired
them. Details are included in the CBS.Log windir\Logs\CBS\CBS.log. For
example C:\Windows\Logs\CBS\CBS.log

C:\Users\Administrator>