Internet stops working

[hiyou]

Hi, I'm running XP SP2, firefox, linksys router (for home network) and for the most part everything works ok.
but about every 10-15 minutes the internet stops working for a second, then goes back. I wouldn't even notice this if it wouldn't happen while i watch videos online or downloading something, at which point the buffering/downloading stops and i have to refresh the whole page and hope it makes it to the end before stopping again!
I don't understand why the internet connection fails (for literally 2 seconds) and then goes back. how do i fix this?

thanks

[Quantos]

Out of curiosity, how come your not running SP3?

[hiyou]

i don't know, guess i've been lazy (for a few years)

[Quantos]

Update to it, that very well could solve your problem.

You will probably need to download it on another system and burn it to disk though.