I updated from Windows 7 to 10 overnight and after getting home from work tried to log in for the first time but have had no luck.

On the log in screen, I am unable to select or type in the password field and the options in the bottom right are also unavailable. I can switch wifi on or off however using my laptop's in built keyboard. Instead the screen just alternates between the 'cave' screen with the time and date and a blue screen with my username and the 'spinning dots'.

What are my options to try and fix this? I believe creating a usb version of the OS using my flat mates PC might be possible and then boot from this but would that wipe everything currently on my PC? Is there any way to repair the installation? I've Googled to see if I can enter safe mode but I believe this is only possible once you are successfully logged in initially.

Thanks in advance