Supposedly the patch only affects some non-Intel processors, BUT, given your situation and my innate caution, I’d recommend you try rolling back the one that’s already unusable before updating the one that still works. Then, if you can get the first one working again, you should be okay to update the Intel-based one.
Thanks for reply . Can’t get thru to HP Japan but will keep trying . If I can’t get help from them I’ll try rolling back . I have turned off auto update on the Dell for now until MS and AMD provide a fix .