Hey there friends,
If this is still happening, let’s clear out the blizzard app to see if it helps.
Perform Steps 1-5 here after that do not reinstall yet but follow these additional steps:
- Open file explorer/file manager
- Type the following into the address bar (not the search bar): %APPDATA%
- Delete the Bnet and blizzard folders inside the appdata folder if they exist.
- Repeat steps 2 and 3 with %LOCALAPPDATA% and %TEMP%
- Empty the recycle bin.
If this does not help, please post back with a DxDiag. It can help us see what is going on if system based.
DxDiag instructions (click to expand)
- Press Windows Key + R.
- Type DxDiag and then press Enter.
- In the DxDiag window, click Save All Information.
- Name the file something you can remember and click Save.
To add it to your reply here:
- Open the text file and copy all of the text.
- Paste the text in your reply.
- Highlight all of the text and click </> on the post editor.
Note: If your DxDiag does not fit in one message, you can break it up into two posts, or post it on Pastebin and provide the numbers/letters after the .com in your reply.
Let us know if this helps or not my friends. 
/Nathardrick