problem installing .net 3.5

I was trying to install .net 3.5 on one of the servers but got an error saying

[09/15/10,15:30:24] WIC Installer: [2] Error code 1603 for this component means "Fatal error during installation." [09/15/10,15:30:24] WIC Installer: [2] Setup Failed on component WIC Installer [09/15/10,15:30:26] WapUI: [2] DepCheck indicates WIC Installer is not installed.

I have the following text in dd_WIC.txt

[dd_WIC.txt] 0.422: ================================================================================ 0.422: 2010/09/16 12:47:27.546 (local) 0.422: c:\0a081a898eb3f7b6b978d9\update\update.exe (version 6.3.4.0) 0.438: Hotfix started with following command line: /quiet /norestart /log:c:\tmp\2\dd_WIC.txt 0.469: In Function GetBuildType, line 1170, RegQueryValueEx failed with error 0x2 0.500: C:\WINDOWS\system32\WindowsCodecs.dll is Not Present 0.500: First Condition in Test.WindowsCodecsVer.Section Succeeded 0.500: Condition succeeded for section Test.WindowsCodecsVer.Section in Line 1 of PreRequisite 0.500: C:\WINDOWS\system32\WindowsCodecsExt.dll is Not Present 0.500: First Condition in Test.WindowsCodecsExtVer.Section Succeeded 0.500: Condition succeeded for section Test.WindowsCodecsExtVer.Section in Line 2 of PreRequisite 0.500: C:\WINDOWS\system32\WMPhoto.dll is Not Present 0.500: First Condition in Test.WMPhotoVer.Section Succeeded 0.500: Condition succeeded for section Test.WMPhotoVer.Section in Line 3 of PreRequisite 0.500: C:\WINDOWS\system32\PhotoMetadataHandler.dll is Not Present 0.500: First Condition in Test.PhotoMetadataHandlerVer.Section Succeeded 0.500: Condition succeeded for section Test.PhotoMetadataHandlerVer.Section in Line 4 of PreRequisite 6.063: InstallInfCatalogFile: Installing c:\0a081a898eb3f7b6b978d9\update\WIC.cat as 000000.cat... 6.063: VerifyTargetFileSize: Unable to verify size as Source = NULL for file c:\windows_000000_.cat 6.078: InstallCatalogFile: VerifyCatalogFile failed for c:\windows_000000_.cat; error=0x800b0109. 6.078: InstallInfCatalogFile: Installation failed; error=0x00000002. 6.078: IsInfFileTrusted: ValidateSingleFileSignature Failed: STR_FAILED_INF_INTEGRITY 6.109: WIC Setup encountered an error: Setup could not verify the integrity of the file Update.inf. Make sure the Cryptographic service is running on this computer. 20.156: CleanupTrustedInfFile: GetFileAttributes for C:\WINDOWS\system32\CatRoot{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\oem13.cat failed: 0x2 20.156: Setup could not verify the integrity of the file Update.inf. Make sure the Cryptographic service is running on this computer. 20.156: Update.exe extended error code = 0xf0da 20.156: Update.exe return code was masked to 0x643 for MSI custom action compliance.

Can anyone plz tell me whats wrong during the installation?

It looks like you need to download and install the Windows Imaging Component (WIC) found here: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=8e011506-6307-445b-b950-215def45ddd8&displaylang=en

What version of Windows are you installing .NET 3.5 on?