disable the registry policy setting

Hello yodar,

Misconfigured settings in Excel is one of the possible reasons why you are having issues saving your file. That being said, I advise following the instructions under For Office 2013 or Office 2010 through this article.

Hope this information helps you. In case you need further assistance, don't hesitate to post back.

this all seems to be addressing a problem opening a file. my problem is saving the file after editing it. i have tried many things in the File Block settings in the Trust Center, and nothing seems to help.

Thank you for posting back.

The article that I have provided can also fix issues when saving a document. However, since you mentioned that it didn't help, I advise repairing your Office by following the instructions found in this article. Doing so will fix any issues you are experiencing when using any of your Office apps. Once done, check if the issue will occur.

Please post back with the result for further assistance.

Since repairing your Office didn't fix the issue, please follow the instructions under Running Repair didn't help. Now what? through this link. Doing so will not only remove your Office program from your computer but will also fix corrupted files and misconfigured settings that may hinder you from saving a file.

Feel free to post back should you need further assistance.

i don't want to uninstall office and lose all my settings. 

please address the basic question: how do i correct the  'registry policy setting' in the original error message.

I found a thread similar to your concern. Kindly follow the solution provided by Dietmar S through this link and see if it helps. If not, then we really have to completely uninstall your Office program to revert back it's default settings where the issue is not visible.

Let me know if you need further assistance.

yes that worked, but as 

said 7 years ago, it makes me wonder why MS hasn't fixed this. please try to get this fixed.