Audio sync problem
 

I've just viewed the Shackleton video someone posted on R & N and it reminds me of a small problem I have.

Whenever I watch videos such as this and any on YouTube and similar on my main computer, the audio is always out of sync with the visual by about two seconds. I hear the sound first then the matching video comes 2 secs later. Quite annoying when there's a talking head in frame. Videos play/stream perfectly on my two laptops.

Anyone got any ideas as to the cause and what I can do about it?

update your sound card drivers
make sure flash is up to date
reset internet explorer to its defaults

how is the computer connected to the monitor? i.e. what kind of lead, and is it direct or via another device?