Laptop crashing when watching video on fullscreen

Hello,

My Dell inspiron e1505 laptop crashes and shows a black screen whenever I watch a video online on fullscreen for a few minutes. It is still running but stops responding completely and I have to force shutdown and restart and redo what I was doing. This problem also happens when I am talking on skype with videos on and also when I am on a website that has lots of animation or requires constant use of adobe flash player. I am guessing this to be a graphic card problem inside the laptop but I am not sure.


Any and all help will be greatly appreciated!!!
Thank you.
 
How much RAM dose the laptop have?

You may need to reinstall windows OS have you tried this or are you capable of doing this?
 
I have 2 GB of RAM and this is Windows XP.

Just today, I opened the laptop and cleaned out a rather thick layer of condensed dirt from the side of the fan and from inside it. The laptop has been running the flash player pretty well for couple of hours since then. I'll check the full-screen videos tomorrow and get back to this.
 
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