Once you have deleted the ikhfile, you will need to
untick the checkbox when you perform a Smart Update so that you do not re-download this file. This is the reason why the blue screen is still appearing.
Apologies for the last reply.
This appears to be a workaround, however, as stated by AChen, "Spyware Doctor Version 5.0 will be released soon and the problem you are experiencing will be resolved with this new version".
cheers