Steam deck freezes while playing then verify installation.

[Alkonaso]

This is a error that was introduced in steam os 3.5 that literally has been a nightmare since today. There is a way to fix it btw and is downgrading to steam os 3.4.11.

Here a video of how to do that:

https://youtu.be/2PzpWfAcQNk?si=yeqEPpwqhWjvfL6s

Either way I hope steam fix their software in future updates. (It has been really annoying)

[Broseph Joseph]

This is a hardware problem with some decks which started to get triggered by a change in OS 3.5, you can try the following to see if it helps
Power down the deck
Hold vol- and '...' buttons
Tap the power button (keep holding the other two buttons)
You can let go of the buttons once you see the power led blinking
The system will take longer than normal to fully boot, let it take its time without powering off.

Try this several times even. If it doesnt help at all, then official advice seems to be RMA your device for a new one.