Plz help for windows 7

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This topic is for them, who have windows 7. Because only they can help me. Actually i have windows 7 beta trial. But cant able to install it. 4 files are corrupt. If any1 want to help me plz send me these four files or upload it somewhere on internet where i can download it. These 4 files are of only one mb. These files are main setup.Exe file. 2nd is Sources\autorun.Dll , 3rd is sources\setwizwinen.Dll , 4th is sources\setup.Exe if some1 help me i really thankfull to him, because my 2 gb setup is garbage without these files.