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I bought a secondhand Dell laptop Latitude D630 which was running windows vista recently i shut it down and when i came to restart the next day its said that one of the files in windows was corrupted i have run a diagnostic and it comes up with the following message  File: \windows\system32\config\system Status: Oxcoooooe9 info:windows failed to load because the system registry file is missing or corrupt it advises that i reinstall windows but i didn't receive a disk when i bought it, it just came with the authenticity sticker what can i do to fix this. I am currently away in the Greek islands for 6 months working so it is not possible to visit a Dell shop in person. 
Dell Latitude D630