After recently becoming almost unusable, I decided to reinstall Win 7. I have now tried 5 times & each time it gets to about 75% installed I get a BSoD, it then restarts then I get the message 'The computer restarted unexpectedly or encountered an unexpected error. Win install cannot proceed. To install win click OK to restart, then restart the installation.' So I tried to install Ubuntu, with much the same result but got a notification that the 'Disc may have errors or overheated.' I know I have had some sort of infection, but can this actually dammage a HDD? I'm now at a loss as what to do. I'm using my laptop to write this post. Regards Alex