Need help to fix corrupt Beep.sys

[Castout]

I ran sfc /scannow and it found several system file corruption but unable to fix some of them.

It turned out to be the beep.sys

Somehow that file is corrupted. Can anyone advise me how to fix this?

A snippet of CBS.log

POQ 117 ends.
2011-02-06 16:01:25, Info CSI 000002d7 [SR] Verify complete
2011-02-06 16:01:25, Info CSI 000002d8 [SR] Repairing 1 components
2011-02-06 16:01:25, Info CSI 000002d9 [SR] Beginning Verify and Repair transaction
2011-02-06 16:01:25, Info CSI 000002da Hashes for file member \SystemRoot\WinSxS\amd64_microsoft-windows-beepsys_31bf3856ad364e35_6.1.7600.16385_none_20159 2fa214e4f02\beep.sys do not match actual file [l:16{8}]"beep.sys" :
Found: {l:32 b:HDq3Unfzm0OfCylVbivf7zXO4ZkHmYvtYyXCUpGdo3g=} Expected: {l:32 b:d8AIrtsH+sZkE4QdZclS3bVv59yl6e+cj0EwM2uDgCQ=}
2011-02-06 16:01:25, Info CSI 000002db [SR] Cannot repair member file [l:16{8}]"beep.sys" of Microsoft-Windows-BeepSys, Version = 6.1.7600.16385, pA = PROCESSOR_ARCHITECTURE_AMD64 (9), Culture neutral, VersionScope = 1 nonSxS, PublicKeyToken