Our Imedia 1502 when started

Question

Our Imedia 1502 when started displayed the following message: Windows could not start because the following file is missing or corrupt \windows\system32\config\systemYou can attempt to repair thisfile by starting windows Setup using the original Setup CD-ROM (which we no longer have).Select 'r' at the first screen to start repair.Is there a website whereby we can download to disc and then transfer to the computer? Many thanks for your help.