If you receive an error similar to the one below:
Error:
Content file download failed. Reason: CRC verification failure. Source File:
/msdownload/update/v3-19990518/cabpool/windowsserver2003.windowsxp-kb908531-v2-x64-enu_ed601a11a3ab95665ef8ac0c9e5db12008090225.exe
Destination File:
C:\WSUS\WsusContent\d3\ED601A11A3AB95665EF8AC0C9E5DB12008090225.exe.
Resolution:
Delete the file C:\WSUS\WsusContent\d3\ED601A11A3AB95665EF8AC0C9E5DB12008090225.exe if it exists
Check that your web filtering software is not blocking access