I have been receiving this windows update error 80070490 since January. I am at a loss as to what to do. I have been reading up on all that I can find about this particular error, and it may be due to registry errors, or a corrupt file, but I just don't know where to begin. I am hoping that someone might be able to help me resolve this issue. I am also unable to do a system restore, I get an error also. Any help would be very much appreciated. Thanks in advance.