Some of the games just freeze with a little bell sound. What's up

Skull icon i think is geralts toxicity level if it fills up he will start losing HP,each potion he drinks adds to this bar so keep a check on it

It sounds like it may be the weight icon.

Can anyone tell me what the skull icon is below the healthbar and next to stamina & sign?

its easy to player and requires little effort to be any good and gives a false sense of achievement withs lots of bells whistles anf flashing lights while constantly telling you how great you are. just look at the Parody Duty Calls and you'll see what I
mean as it shows up the main thing about COD and strips away the idea of it being some brilliant game.

Little bit more info as its just done it while i was posting the last message.

Playing game then game freezes and makes a sound through tv speakers which sounds a bit like an old pc loading of tapes does this for 3 or 4 seconds then totally shuts down but will power back up straight away then runs as if nothing has happened