https://support.software.dell.com/appassure/kb/129774
Find each of the VSS writers in a failed state by issuing this command in an elevated command prompt – vssadmin list writers.
Make a list of all the failed VSS writers or take a screenshot.
Find the VSS writer’s associated Service Display Name in the table below and restart the service.
Issue the command again to confirm the status has changed Stable with no Error – vssadmin list writers.
Attempt to perform another snapshot.
If the VSS writers fail again, it will be necessary to restart the server.
VSS Writer Service Name Service Display Name ------------------------------- ----------------------- --------------------------------------- ASR Writer VSS Volume Shadow Copy BITS Writer BITS Background Intelligent Transfer Service COM+ REGDB Writer VSS Volume Shadow Copy DFS Replication service writer DFSR DFS Replication DHCP Jet Writer DHCPServer DHCP Server FRS Writer NtFrs File Replication FSRM writer srmsvc File Server Resource Manager IIS Config Writer AppHostSvc Application Host Helper Service IIS Metabase Writer IISADMIN IIS Admin Service Microsoft Exchange Writer MSExchangeIS Microsoft Exchange Information Store Microsoft Hyper-V VSS Writer vmms Hyper-V Virtual Machine Management NTDS NTDS Active Directory Domain Services OSearch VSS Writer OSearch Office SharePoint Server Search OSearch14 VSS Writer OSearch14 SharePoint Server Search 14 Registry Writer VSS Volume Shadow Copy Shadow Copy Optimization Writer VSS Volume Shadow Copy SPSearch VSS Writer SPSearch Windows SharePoint Services Search SPSearch4 VSS Writer SPSearch4 SharePoint Foundation Search V4 SqlServerWriter SQLWriter SQL Server VSS Writer System Writer CryptSvc Cryptographic Services TermServLicensing TermServLicensing Remote Desktop Licensing WINS Jet Writer WINS Windows Internet Name Service (WINS) WMI Writer Winmgmt Windows Management Instrumentation