This is for Outlook 2010 on Windows 7. If you check your Fonts via Control Panel look for the Helvetica font and if it is displaying something like $%& instead of ABC (as all the other fonts show) delete it as it is corrupt. If you must have Helvetica loaded look for a version that displays properly in your Fonts folder. There are many font foundaries that offer Helvetica, such as True Type, Adobe etc. If you load a new version of Helvetica and and your emails start crashing again you know where to look for the culprit.
I hope this helps someone!
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Article ID: 60, Created On: 8/14/2010, Modified: 11/1/2013