I received an error after years of digital signing my documents. "The Windows Cryptographic Service Provider reported an error: Object already exists. Error Code: 2148073487" I've tried the suggested fixes on the article: http://helpx.adobe.com/acrobat/

I received an error after years of digital signing my documents.  "The Windows Cryptographic Service Provider reported an error: Object already exists. Error Code: 2148073487"  I've tried the suggested fixes on the article: http://helpx.adobe.com/acrobat/kb/error-creation-signature-could-completed.html  I am still receiving this error.  How can I get this fixed?