Raspi 5 freezes after 1 minute

Hello! I use a Raspi 5, 8GB RAM with active cooler starter kid. It arrived yesterday. I installed the Raspberry Pi OS 64 bit & Retropie yesterday. Today, I couldn’t open RetroPie anymore, so I updated. The error messages I became was: Error installing packages -the following packages have unmet decencies: libsdl2-dev: hängt von: libsdl2.2.0(=2.26.3+1rpi) but 2.26.5+dfsg-1 is to be installed I then installed the 2 packages manually. sudo apt upgrade libsdl2-2.0-0 libsdl2-dev After the installation, I could open RetroPie again. I rebooted the raspi and after about one minute it froze completely. I rebooted the raspi again but the same problem occurred.