SBS 2011 cannot start VSS writer NTDS

Good morning everyone,

The VSS writer instance NTDS is failed starting. Due to this problem Volume Shadow Copy does not work and the back-up software of my client stops working.

vssadmin list writers gives:

Writer name: 'NTDS'
   Writer Id: {b2014c9e-8711-4c5c-a5a9-3cf384484757}
   Writer Instance Id: {05d55de7-6430-4fc2-bada-9e1781d21dd2}
   State: [1] Failed
   Last error: Unrecoverable error

I have found steps to re-register the VSS writers but that procedure is for Server 2008 and I am not sure if it cannot harm.

Please help.

Thank you.