Dynamics CRM notes attach error occured try this action again,

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A new user experiences this error every time he goes to Note and tries to attach a file from her local desktop.  This happens on her IE and Google Chrome.

Solution:

Check that problem related to Notes Attachment (While creating new) only either is also related to user role assigning.

IF = Yes

Go to Services start MS Dynamics CRM server those are (Stop OR Hold).

Specially SandBox Service = Start

       and Asyn Service = Restart.