Vostro 3460 overheating

Hello,

the laptop suddenly started overheating when playing games that aren't particularly HW demanding (Aura Kingdom, medium details).

Idle / browsing CPU temperature is about 50-60°C, which is a bit on the high side, and after several minutes of gaming (no heavy load, about 20% CPU usage) the temperature climbs to 90-100°C and eventually the laptop shuts down.

The fan is working, nothing seems to be obstructing the air flow, laptop is being used on a flat glass surface, there's no visible dust accumulated. Using A19 BIOS driver, which I believe is up to date.

Thank you for any suggestions.

PS: Normally I'd start somewhere else and wouldn't spam the forums, but after several hours of browsing the support site I'm just too frustrated. I wanted to run Dell PC Diagnostics, which failed to recognize my Service Tag. I wanted to write an Email or join the Chat, but those options are not supported in my region (No Email support in Europe?? Seriously??)