I didn't bother but that's because I a USB dock sound card and a blue tooth headset so the Conexant were fairly irrelevant to me.
I would imagine if you ran the patch to put on the Micrsoft hi def drivers again after updating it would work - I haven't bothered. (Unblock, apply from the link I used to MS drivers, then block again to stop windows update "improving" it back to conexant for you). I note some people have said they made the block more specific/precise and that others added the Conexant drivers anyway and said they were fine - but I note MS's text says bleu screens during and whilst running so that sounds risky.