I'm writing here because I didn't find any advice for similar problem..

My laptop started to act really weirdly around a week ago, getting really hot, slowing down rapidly, full charged battery shows I only have 1h35min.. Today it slowed down, I went to activity monitor to see what is goin on and I found out that Finder is using 3.9GB real memory ! I quit that processes and computer cooled down. But still, what can cause this problem ?

My laptop started to act really weirdly around a week ago, getting really hot, slowing down rapidly, full charged battery shows I only have 1h35min.. Today it slowed down, I went to activity monitor to see what is goin on and I found out that Finder is using 3.9GB real memory ! I quit that processes and computer cooled down. But still, what can cause this problem ?