error while installing sql server 2008 r2 express in a windows 8 pc

i got following error while installing sql server 2008 r2 express in a windows 8 pc
Microsoft (R) SQL Server 2008 R2 Setup 10.50.1600.01 Copyright (c) Microsoft Corporation.  All rights reserved. Unhandled Exception: Microsoft.SqlServer.Chainer.Infrastructure.ChainerInfrastru ctureException: The file or directory is corrupted and unreadable.  ---> System.IO.IOException: The file or directory is corrupted and unreadable.    at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)    at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, I nt32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions o ptions, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolea n useLongPath, Boolean checkHost)    at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileSha ...