Try in Admin mode error + blue screen

[prag92]

I have seen many posts about the error with the license key and unfortunatly mine seems to happen with a twist. I have the same old message: "Impossible to write and save your license in your system! try in admin mode." but once i click ok it does not ask for a license key but my computer crashes after my desktop disappears and the blue screen appears, upon rebooting vistas problem thingy says there is a hard disk error though the scan comes clean. Can anyone help?