Restarting glitch

[grounded]

  I am not sure where to post my problem. When I open anything like mail It opens fine, then closes, and after a second or two it reopens, everything is normal from there on, I  can live with it but there must be an easy fix. Totalav scans find no problem.

[grounded]

Looks like I have solved the problem, just don't know how, I went to settings and played around with  Lines and speed and the doubling up has dissapeared . thanks for looking at the post.