"class not registered" error when saving excel

Running Office 2010.
When saving a document in Excel, a window pops up with the document name, followed by "class not registered".
And I can't save the document, any document.

I am using Win7 Ultimate 64bit
Answer
Answer

Try running Excel with the /regserver switch. With Excel closed, go to the Windows Menu and choose Run. There, enter the following, including the quotes:

 

"C:\Program Files (x86)\Microsoft Office\Office14\Excel.exe"  /regserver

 

Of course, your path the Excel.exe may be different. This will start Excel and cause it to rewrite its registry keys and file association and the other plumbing that makes Excel work.

 

 

Cordially,
Chip Pearson
Excel MVP 1998 - 2014
Pearson Software Consulting, LLC
www.cpearson.com

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Last updated September 14, 2020 Views 8,738 Applies to: