... despite Jimwynne's recommendation of the forums as a substitute for good microsoft aftermarket support, my experience is that the quality of recommendations from the forums is random at best and as likely to be a complete waste of time or even worse...
...I think the best solution is to stop using and paying for microsoft office when my subscription ran out and using google docs instead until microsoft provides an official solution to this system restore problem.
What does Microsoft Office have to do with the subject? Your statement regarding the quality of help here also describes Microsoft's own technical support pretty well. With Windows, you have only a few choices: You can get independent direct help from a trusted source, or you can educate yourself at least to the point where you can discern which suggestions are likely to be the best ones.