title: VSS Errors 1920 and 4350 can be safely ignored created_at: 2015.09.08 updated_at: 2015.09.08 category: Troubleshooting platforms: Windows ---

Due to how Windows Update works, Retrospect backup of a Windows volume may show error 1920 or 4350 for many files under:

These errors don’t affect the backup’s validity because affected files are actually inside a Windows disk image (.WIM or .VHD) file which does get backed up as a whole by Retrospect.