Hi neilpzz,
1 I have created a password which is accepted.
2 It has never been a problem to open Command Prompt, no UAC prompt appears/ Getting there is via the Administrators accont which is the only choice. No password is accepted though but just a blank is okay. .
Going back, where the Command Prompt choice is offered (In Advanced Options) Ther is a System Restore option. I seem to remember trying this previously but it raised the UAC prompt without the yes button (I may be wrong here)
Now I am taken straight to System Restore and I could continue I reckon.
The UAC prompt without yes button still appears with other actions.