This wasn't the only problem I had, as I found out.
First I wanted to boot into Safe mode, but couldn't do that because the keyboard was not working in BIOS. To solve that I just removed the battery and left it out for around 10/15 minutes so that any residual power would be dissipated.
Once I managed to get into Safe mode I made some changes to my user account and added myself to the Aminstrators group. Then rebooted back into normal mode , where I could make changes and click on the YES button.
Finally onto the network problem of being stuck on a Public network. Now that I could open the properties box of the ethernet adapter , I saw that the 'Obtain the following IP address option was selected, but there was no IP address there. Once I changed that to 'Select automatically' solved the Public network problem as it was change back to Private Network automatically.
If any of the admins wish to remove this post, then go ahead and do so, but my reason for posting this was because I had the above problems and I started a post asking for help with them, but I solved them myself.
I also thought that it may be useful for other users of this site.
Edited by Avalon60, 21 February 2016 - 08:45 AM.