A friend of mine brought a laptop from girl he worked with for his mother. Recently she has been trying to install the new version of Internet Explorer and download various Microsoft updates, but upon validation of windows, she is told that the version she has is not genuine. The girl her son brought it off no longer works with him and he is unable to contact her. I have a Windows XP disc that I have not used as I got it with something else I purchased. If I where to put this disc in her laptop and install Windows XP, would this overwrite the current version and install a new genuine version of XP. She did not get a restore CD with her laptop, the only other way is through the BIOS? Reset default factory settings? So is there a way that she can install a genuine copy of windows XP on her laptop so she can download and install software successfully?