I had the previous Process Explorer 16.x.x installed but I have tried upgrade to 17.0 and at the end of the installation I get a warning that the download is not valid. I download the PE 17.0 paf.exe directly and get same results. I uninstalled my 16.x.x version and attempt fresh install of PE 17.0 and get same result. I tried reinstalling version 16.x.x and get the same message.
I copied version 16.x.x from a backup into the portableapps folder and it opens fine.
I am running windows 10 64bit and it is up to date.
P.S. I downloaded the zip file directly for process explorer. It appears to be ver 22.214.171.124 vs 17.0
could this be the problem?