Help file installation error

Hi! I downloaded ObjectARX 2012 Documentation - VS2010.msi. I ran the installer package. Then I opened VS 2010. Form Help menu, I chose Manage Help Settings. Then on the Help Library Manager dialog box, I chose Install conten from disk. I selected helpcontentsetup.msha. During installation, it popped up an error message.

An exception has occurred. See the event log for details. The help files were not installed. Here is the content of the related event log error entry.

Log Name: Application

Source: HelpLibManager

EventID: 1003

An error occurred while updating local content: Microsoft.Help.CacheLib.CacheLibCabSignatureException: The digital signature on file c:\ProgramData\Microsoft\HelpLibrary\content\Autodesk, Inc\incoming\4fded98b-55d4-4d12-83ea-86498d9c82c0\AdskManaged.cab could not be verified.

at Microsoft.Help.CacheLib.DocumentationCache.<>c__DisplayClass5c.<VerifyAndExtractPackages>b__58(String cabFile)

at Microsoft.Help.CacheLib.Extensions.Each[T](IEnumerable`1 that, Action`1 lambda)

at Microsoft.Help.CacheLib.DocumentationCache.VerifyAndExtractPackages(VendorName vendorName, ChangeDescription change, StatusCallback`1 statusCallback, CertificateCheckCallback certCheckCallback)

at Microsoft.Help.CacheLib.DocumentationCache.IntegrateChange(VendorName vendorName, ChangeDescription change, StatusCallback`1 statusCallback, CertificateCheckCallback certCheckCallback)

at Microsoft.Help.CacheLib.DocumentationCache.Update(VendorName vendorName, Boolean checkForOnlineUpdates, StatusCallback`1 statusCallback, CertificateCheckCallback certCheckCallback)

at Microsoft.Help.CacheLib.CacheManager.<>c__DisplayClass24.<UpdateAsync>b__23()

at Microsoft.Help.CacheLib.AsyncOperationRunner.Run(Object state)

Please help.

Thanks,

Zhuo

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