I had this issue with the previous version of Photoshop 2017 and 'solved' it by deleting the Dicom plug-in. This does not help this time. I was able to use the 2015.5 version but after a tech took over my machine, removed all photoshop files manually not only does the 2017.1 version not work but nor does the 2015.5 version that he reinstalled. He told me to wait 2 week until Microsoft and Adobe release updates. By trying to update 2017.0 to 2017.1 I have lost the use of photoshop for 3 weeks (supposing that the updates fix the issue). To me this is unacceptable I am struggling to find a reason to renew my subscription when it is due.