Win 10 will not boot after update says it cannot find boot disk
I booted a Win 10 Pro install disk and tried to run system restore, i.e. rstrui. Says no restore point found, I know that is not true I just manually set one yesterday. I assumed it was looking for it in the wrong place so I change to the correct drive and Windows\system32. Now when I enter rstrui nothing at all happens.
I've tried to repair Windows 10 from the CD says it cannot fix it
I've run sfc /scannow - no errors
Any other tried and true methods other than reinstalling Windows