I agree with you. That's the horrible part of this problem. My friend's laptop
is completely fine.

I doubt its the internet connection. I ran speed tests and it shows brilliant
speeds. Live streaming on BBC works ok. I never managed to download iplayer on
my pc. It always gave errors and never tried to figure out (my bad).

Full screen or no full screen does not make a whole lot difference.

If my computer cant cope with data, then how XP is not affected?

Are there any log files created so at least I can understand whether its the
hardware problem (which i seriously doubt) or the software?