|Theoretically, you may be able to utilize a windows 7 recovery disk, the only issue is that you would be unable to access the files that are currently on there. If your only interest is in the use of the computer this should enable this.|
In polite regards to riider, there are many posts on this forum that inquire as to the best way to bypass security settings that are the result of stolen, or mischevious purposes. I believe that is where riider's concern lies, as that isnt the intent of this site.
best of luck,