Hey, i have a HP Pavilion DV6000 and i had the same problem, heres a few things what to do...
1) See your battery meter at the bottom right of your screen, right click it and view 'power options', Now, select the HP reccomended settings (Or if you REALLY want to strain your PC select high performance) then click change plan settings, Then click advanced power settings. This is where all the good stuff happens to make your power plan do its deeds, scroll down to 'Processor power management' and click the + button, now you want to lower your minimum and maximum processor state by 5 or 10 percent, you shouldn't feel much difference but it cools your laptop down quite a bit ( or it did in my case )
2) Dim your screen a little in power options, turn it down to 3/4 of its maximum brightness, its not an instant cool down but it will eventuly knock a degree or two off
3) ok, this one is a little extreme and i reccomend buying a pressurised can of air instead but if your on a really low budget... Grab a hoover and hoover out any dust from the vent where your fan is located, BE VERY CAREFUL!! highly unreccomended by Hp and most other companys but when i do it every few months i get a good lump of dust flying out of the vent, this cools down my laptop LOADS, by loads i mean from 87 degrees playing minecraft to about 50, but be very careful, im not taking responsibility for you sucking every microchip out of your laptop
4) Kill any unessecary background programs. Your internet security antivirus running when your not connected to the internet? your printer spooler running when you dont even own a printer?? Alt+Ctrl+del, this brings up task manager, you want to kill some services and processes but BE WARNED, dont blindly kill everything you see! this will most likely crash your computer
5) go to your local electronics store, see if they have any really cheap laptop stands that have good air circulation, if you cant afford any or dont want to spend much money i reccomend buying a few erasers (or rubbers depending if your british or not ) and stacking them under the corners of your PC
If non of these fix your laptop overheating problem contact me, il be sure to try and help with a few more methods, its just my fingers are hurting from typing HAYO!