Rattling inside laptop??

[Matchbox7]

Hi everyone I have a Windows 8 hp laptop that is about a year old and for the past few months I have been hearing a weird rattling sound Inside it it happens most often when my laptop gets tilted  or put on an angle like on my legs or when I let it rest on the top part to stop the fan from over Heating when I leave. It sounds almost like there is a bit of plastic or metal inside it that keeps hitting the inside of my laptop somewhere but I don't know where. I think it might be inside the fan. If it is inside the fan how do you open the fan so I can get it out? Sorry if this is hard to understand I'm Not very  good at writing this kind of stuff :p all help would be appriciated

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[DaveLembke]

Easiest method of figuring out what it is would be top open it. That is if you feel comfortable enough to do so without damaging it. Its probably a piece of plastic although if it was a small screw which then came into contact with electronics it could kill the system.

If it were my computer, I would open it and remove the stray piece vs taking risk of killing it if it shorts or stops a fan etc.