Haloo, you may remember that I was having problems with my computer a bit back, well it all went tits up and I ended up with a reformat.

Everything has since been fine, but I have one annoying problem. Every about 15 minutes, a program pops up on the taskbar, and then almost straight away disapears again. I cant tell what program it relates to as its symbol is the same white box you get when something is not responding. I assume its something that updates itself, but it still does it offline.
Virus scanner is up to date, and spybot checks have been done.

The problem is that with games this causes a second or so stutter in the case of CS, or at worst with other games, they minimise, leaving me back at desktop, which is quite annoying.

Is there any way of descovering what program it is causing this problem? Cheers.