Re-register VSS Providers


 * 1) Open a command prompt
 * 2) Run the following:


 * C:
 * C:\%SYSTEMROOT%\SYSTEM32
 * NET STOP VSS
 * NET STOP SWPRV
 * regsvr32 /s ole32.dll
 * regsvr32 /s vss_ps.dll
 * vssvc /Register
 * regsvr32 /s /i swprv.dll
 * regsvr32 /s /i eventcls.dll
 * regsvr32 /s es.dll
 * regsvr32 /s stdprov.dll
 * regsvr32 /s vssui.dll
 * regsvr32 /s msxml.dll
 * regsvr32 /s msxml3.dll
 * regsvr32 /s msxml4.dll
 * NET START VSS
 * NET START SWPRV


 * 1) Reboot your server and run vssadmin list writers to ensure all are well.

or if that doesn't help,


 * c:
 * cd %systemroot%\system32
 * net stop "System Event Notification Service"
 * 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 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"
 * net start swprv
 * net start vss