This morning I got a call from a colleague who was having problems opening one of our Microsoft Powerpoint files. After quite a while of saving back and forth (My newly created and not-yet-updated PC had no problems with the files), we discovered that it affects everyone in the office - in fact, everyone in the world. As it turns out, Microsoft issued a "Killer Update" on 12 April which causes Microsoft Powerpoint to fail when opening presentations or presentation templates which have a graphical background (like our company logo for instance). Microsoft's "Workarounds" They've acknowledged the problem here. http://support.microsoft.com/kb/2464588 Their fix generally suggests that you upgrade; Workaround 1: Open the Affected file in Powerpoint 2007 or 2010..... Workaround 2: Open the affected file in PowerPoint 2010.... Workaround 3: Open the affected file in PowerPoint 2007... Workaround 4: After the error message is displayed, save a copy of the presenta...