I recently raised the issue on Microsoft's Q&A site regarding older, but technically compatible processors not being accepted by the PC Health Check tool, nor being on Microsoft's accepted processors list. I was mainly concerned about technically compatible processors used on machines other than PCs but used for VMS not even being considered. I got the following encouraging response: I also plan on raising this (as was also recommended) in Microsoft's Win11 forum at https://answers.microsoft.com/en-us...&threadType=All&isFilterExpanded=false&page=1. It does no good if only I do this and helps if they get a virtual deluge of questions for those of us in this situation. Then perhaps we can get some critical mass on this potentially huge problem.