Welcome and thank you for your question. My name is ***** ***** I am glad to assist you today.
Are you using Windows Vista, 7, 8, or 10?
Also, can I remotely access your computer so that I can directly assist you in fixing the issue while you watch on your screen?
Please let me know so that I can assist you further.
Thank you for writing back with that information. We can first try to this written instructions method and see if we can get this issue resolved. We can do the remote session later then if you want.
Now, you mentioned that your old PDF files normally opens in Reader but now they no longer open with the new Reader DC. Please try the following:
I hope this helped.
Please remember to rate my service positively (3-5 stars/faces) if this helped. If you need further assistance, please do not rate me negatively (1-2 stars/faces). Instead, please reply to me so that I can assist you further.