I had an occasion to install a small device which was of no subsequent use to me and I opted to 'Restore" to the day before. Having gone through the motions the Restore programme advised me that 'No Changes Had Been Made etc. and to choose another point. I did this four times with the same result. The Restore window that comes with this message is headed 'Restore Incomplete'. What could be causing this? Any advice will be welcome.