Thank you for your reply. I know disabling system restore removes the previous points. However, as I wrote, I could not restore to them anyway. The most common advice when system restore does not work is to disable, reboot and enable it and try again (with a new point of course:-) However, this did not work and does not work for me.
Thank you for your reply. Yes, I realize there are other solutions other than using system restore. However, there must be a reason why it is not working on my computer. This is one of my concerns.