.Net Updates will break client backups

Microsoft released today (May 13, 2014) a security update for the .Net Framework (KB2960358).

However, after applying this update, client backups on SBS 2011 Essentials, WHS 2011, Server Storage Essentials 2008, and 2012 Essentials will fail.

Microsoft has already released updates to fix this problem:

• KB2934957 for Windows 2012 Essentials
• KB2934950 for Windows 2011 Essentials, WHS 2011, WSSE 2008*
  * Please note, before applying this fix, there is a pre-requisite that the server has the appropriate Rollup 4 update applied.