When you try to download updates from Windows Update on a computer that is running Windows Vista, you may receive the following Stop error message:

STOP 0×80070246
ERROR_ILLEGAL_CHARACTER

Additionally, the following entry may be logged in the WindowsUpdate.log file:

Automatic Updates Failure Content Install
		  Installation Failure: Windows failed to install the following update with error
		  0x80070246: "Name of Update"

Note: The WindowsUpdate.log file is in the following location:

%Windir%\WindowsUpdate.log