My Compaq Laptop is soo slow!?

[chubbyflavor552]

What should I do? It sometimes works but when it does i can watch say 2 or 3 videos on youtube then it goes really slow and crackly. sometimes it says high CPU usage and i dont know what that means please someone tell me whjats wrong with it or how to fix it its really annoying i dont usually go on weird sites i normally just go on facebook youtube pinterest twitter and occasionally google sites if i have to look something up please help!!! xxxxxxxx ill choose best answer xxx
I dont have 3 youtube videos up at once i mean i have facebook and youtube up i can watch 3 youtube videos on youtube (the tab thats already open) i dont have 3 tabs of v videos up thats just stupid i only have 2 tabs open at once xxxxxxx