Computer slowed way down could it be heat related?

Dave the rave

Prominent
Feb 28, 2017
3
0
510
HP 2000 screen goes dark, still can see page and taking 30 sec-60 seconds to load e-mail page. Is this heat related or has motherboard started to fail. It has a new terabyte SSD and 8 gigs ram it should be pretty fast but NO. Any suggestions other than buy a new one?