Please Help Me Since LAST UPDATE i had been UNABLE to save any document OFFICE ENTERPRISE 2007

Since the LAST UPDATE, I had been getting this error message:

Save as c:/users/documents/anyfilename

here is what i get:

File not found

Check the filename and try again.

This is alarming to me as i am NOT ABLE to save in any format docx, pdf nothing.

Just that error in my face.

HP 510-p026 i5 WIN 10 PRO with OFFICE 2007 Enterprise.

Thanks for all the effort and patience, as I frustrated, as i cannot find a reasonable or leading solution, in the knowledge base i totally scoured.