How to Re-register Volume Shadow Copy Service (VSS) Components on Windows 2003/Windows 2008

If an Exchange Backup Job is performed with AOFO and Sybari Antigen product is installed in ESE mode, the error: “AOFO: Initialization failure on: \\servername\Microsoft Information Store\First Storage Group Advanced Open File Option used: Microsoft Volume Shadow Copy Service (VSS)” may occurHow to Re-register Volume Shadow Copy Service (VSS) Components on Windows 2008/Windows 2003.


How to Re-register Volume Shadow Copy Service (VSS) Components on Windows 2008/Windows 2003.


VSS may not be working in one or more of the following ways:

1. Volume snapshots may fail with errors.
2. Backups using VSS may fail.
3. One or more VSS writers are missing when running the following command:
•vssadmin list writers

4. Using Backup Exec for Window Servers, backup jobs may:
•fail with VSS or snapshot errors.
•hang at snapshot processing.

5. Using Backup Exec System Recovery, backup jobs may:
•fail at 5%.
•appear to be progressing, reach 90% or higher then fail.

Re-registering VSS in Windows 2008 & testing is done in 2 parts:

Part 1 – Create and Execute a batch file named, FIXVSS08.BAT:
Please note the following:
•Run the batch file as Administrator.
•This is only for Windows 2008, not Windows 2003.

After running the .bat file, reboot the server to bring all of the writers into a stable state.
Copy and paste the following into Notepad, then click Save As and save it as FIXVSS08.BAT.



net stop “System Event Notification Service”

net stop “Background Intelligent Transfer Service”

net stop “COM+ Event System”

net stop “Microsoft Software Shadow Copy Provider”

net stop “Volume Shadow Copy”

cd /d %windir%\system32

net stop vss

net stop swprv

regsvr32 /s ATL.DLL

regsvr32 /s comsvcs.DLL

regsvr32 /s credui.DLL

regsvr32 /s CRYPTNET.DLL

regsvr32 /s CRYPTUI.DLL

regsvr32 /s dhcpqec.DLL

regsvr32 /s dssenh.DLL

regsvr32 /s eapqec.DLL

regsvr32 /s esscli.DLL

regsvr32 /s FastProx.DLL

regsvr32 /s FirewallAPI.DLL

regsvr32 /s kmsvc.DLL

regsvr32 /s lsmproxy.DLL

regsvr32 /s MSCTF.DLL

regsvr32 /s msi.DLL

regsvr32 /s msxml3.DLL

regsvr32 /s ncprov.DLL

regsvr32 /s ole32.DLL

regsvr32 /s OLEACC.DLL

regsvr32 /s OLEAUT32.DLL

regsvr32 /s PROPSYS.DLL

regsvr32 /s QAgent.DLL

regsvr32 /s qagentrt.DLL

regsvr32 /s QUtil.DLL

regsvr32 /s raschap.DLL

regsvr32 /s RASQEC.DLL

regsvr32 /s rastls.DLL

regsvr32 /s repdrvfs.DLL

regsvr32 /s RPCRT4.DLL

regsvr32 /s rsaenh.DLL

regsvr32 /s SHELL32.DLL

regsvr32 /s shsvcs.DLL

regsvr32 /s /i swprv.DLL

regsvr32 /s tschannel.DLL

regsvr32 /s USERENV.DLL

regsvr32 /s vss_ps.DLL

regsvr32 /s wbemcons.DLL

regsvr32 /s wbemcore.DLL

regsvr32 /s wbemess.DLL

regsvr32 /s wbemsvc.DLL

regsvr32 /s WINHTTP.DLL

regsvr32 /s WINTRUST.DLL

regsvr32 /s wmiprvsd.DLL

regsvr32 /s wmisvc.DLL

regsvr32 /s wmiutils.DLL

regsvr32 /s wuaueng.DLL

sfc /SCANFILE=%windir%\system32\catsrv.DLL

sfc /SCANFILE=%windir%\system32\catsrvut.DLL

sfc /SCANFILE=%windir%\system32\CLBCatQ.DLL

net start “COM+ Event System”

Part 2 – Testing VSS by performing a System State Backup:
•You must first open a command prompt by right-clicking on Command Prompt and select Run As Administrator.

The command to start a System State Backup is:

Wbadmin start systemstatebackup -backuptarget:F:

Additional Notes:
•F: is the target drive where you wish to store the system state backup.
•This shouldn’t be a drive that is hosting any of the files included with System State.
•For Windows 2003, please refer to the following article:

For additional details, refer to the following Microsoft Technet article:

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