Issue: [ERROR] VSS_E_WRITER_INFRASTRUCTURE

When performing a file backup, the following informative messages are received in the backup report:

Backup Logs  No.  Type  Timestamp  Backup Logs *  Info YYYY/MM/DD hh:mm Starting to create Shadow Copy Set ... *  Info YYYY/MM/DD hh:mm [Shadow Copy] (1/10) Will retry in 60 Sec.                                                               *  Info YYYY/MM/DD hh:mm [Shadow Copy] (2/10) Will retry in 60 Sec. *  ...  ...  ... *  Info YYYY/MM/DD hh:mm [Shadow Copy] (10/10) Will retry in 60 Sec. *  Info  YYYY/MM/DD hh:mm [ERROR] VSS_E_WRITER_INFRASTRUCTURE

Notes:
Since a Shadow Copy cannot be created, the error above will usually result with the following error being flagged as well:

Backup Logs  No.  Type  Timestamp  Backup Logs *  ... ... ... *  Error  YYYY/MM/DD hh:mm [ERROR] VSS_E_WRITER_INFRASTRUCTURE

This is a Microsoft Volume Shadow Copy issue.

Windows XP / Vista:
To resolve the issue, please re-register the Volume Shadow Copy Service. To do so, you could utilize the "RegisterVSS.bat" script available in ${Install-Home}\bin. Please also reboot the machine afterward

Notes:
Please safely ignore the error message(s) displayed during the re-registration, as some of the DLL files are platform specific.

Windows 2003:
To resolve the issue, please follow the instructions below:

1. Please backup the registry key -
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\EventSystem\{26c409cc-ae86-11d1-b616-00805fc79216}\Subscriptions
2. Remove this registry key along with all its sub-keys
3. Reboot the machine

Although, it is not an official recommendation from Microsoft, this key will get recreated after the machine is restarted.