I recently downloaded some free antimalware and ran a scan it picked up a few things and deleted them, you need to re boot which I did but forgot that I was still connected to the internet.

Now when I try to log on I get a message "this version of windows needs to be registered before you can log on, and then prompts for the product key, problem is I inherited this little note book thing "Eee pc" from my late son, and the product key is long gone.

I tried to get in on safe mode but no good, anything I can do?? any help appreciated.