New
#1
Try Control panel - Troubleshooting - Appearance and personalization - Aero
or
Control panel(view by category) - System and Security - Find and fix problems - Appearance and personalization - Display Aero desktop effects
Hi JaspersDev and Welcome to SevenForums,
Have a read through the different methods at the below tutorial and make sure all your settings are correct.
Aero Peek - Turn On or Off
Regards,
Jamie