Did you update any drivers shortly before the problem? Has the laptop been around a lot of dust? Have you spilled anything on it? What are the temps you say are so high? What version of Windows? Have you booted to Safe Mode and checked for viruses? What is the brand of your PC? Since it's only 3 months old, it should still be under warranty, so you should check with the manufacturer about it.
These are my laptop's specifications:
Processor: AMD A8-4500M APU with Radeon(tm) HD Graphics 1.90 GHz
RAM memory: 6GB
Type system: 64-bits
So in total, not a bad pc to game on, right?
When I first had this PC about 3 months ago everything was working fine, my games were lag-free and everything ran smoothly. But recently i've been experiencing problems, my games are lagging massively, everything takes longer to start up or load and my pc gets boiling hot, really quick.
My windows experience index score is only 2,3, and 3 months earlier it was 8,7.
What could be the problem?