| Event Id | 20 |
| Source | VSS |
| 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 {<GUID>} and Name MSSQL_ClientVirtualDeviceSet is [0x80040154]. |
| Event Information | When you try to run a backup on a computer that is running Microsoft Small
Business Server 2003, the backup may fail, and you may find this event along
with number of other events from VSS and ESENT. Cause: This problem occurs when the backup program tries to use a Sqlvdi.dll file that has been unregistered. Typically, the Sqlvdi.dll file can become unregistered when you uninstall SQL Server Desktop Engine (also known as MSDE 2000) from a computer that is also running Microsoft SQL Server 2000. Resolution: To resolve this problem, re-register the Sqlvdi.dll file. To do so, follow these steps: Stop SQL Server. Click Start, click Run, type Regsvr32 Path\SQLVDI.DLL in the Open box, and then click OK. The default path of the Sqlvdi.dll file is C:\Program Files\Microsoft SQL Server\80\COM. Restart SQL Server. |
| Reference Links | Backup fails on a computer that is running Small Business Server 2003 |
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