Hi,
If you're using Windows 10 go to Control Panel\System and Security\System and select "Advanced System settings"
You can also access system properties by right-clicking on "My Computer" desktop icon, then select Properties from the context menu.
Click next the "Advanced" tab and then "Settings" in the Performance section for "Visual effects, processor scheduling, memory usage, and virtual memory".
On the next dialogue box that will popup, you will be in the "Visual Effects" tab. In the list of items below, un-tick "Enable Peek" and click OK.
That should do. But it may be necessary for you to log out and log back in for the changes to take full effect.