CAPI2 error 513 and backup error 517

Windows Server 2012, SQL Server 2012, SharePoint 2013 RTM.

Unable to make a system backup using Windows Server Backup. App log has:

Backup error 517 - the system writer is not found in the backup

CAPI2 error 513 - failed while processing the onidentity() call in the system writer object... unable to push subdirectory

vssadmin list writers - this command lists 12 writers but system writer is not listed

I have performed the permissions checks suggested in the threads linked below.

I have not moved the asp.net temp files.

I have tried to regsvr32 the capicom.dll but it says the specified module could not be found.

I see this is apparently a known issue with SharePoint 2013, as linked below.

Is there a solution? Thanks,

refer to: http://social.technet.microsoft.com/Forums/en/winserverfiles/thread/4458947a-623e-45c1-b8e4-868aad1e93b0

refer to: http://weneversleep.com/2012/09/21/sharepoint-2013-preview-breaks-vss-system-writer/

Thanks

Bill

Bill Coulter