QUOTE (Fencefry @ Oct 5 2009, 09:35 PM)

I think Cattiius meant the first and third tab, so you can take out all those screenies

Amg sorry. I'm using Windows 7 and I think it must use a different version of dxdiag.exe, because my tabs are really different

Anyway, I'm a bit surprised. Considering the problems you're having I was expecting a lower spec, for playing Runescape in HD your processor and RAM are easily capable enough. Admittedly your graphics chipset is quite poor, but it should still be able to cope with Runescape...
You mentioned the problem happened in Chrome and Safari, could you try any other browsers? Also, does the problem also happen when you're in standard detail? I expect it won't, in which case it's probably some sort of graphics problem...Are your graphics drivers up to date? If you go into Device Manager (should be in All Programs > Administrative Tools I think, it's been a
long time since I last used XP

), right-click Properties on your graphics chipset and click the Update Driver button, Windows will search for any newer drivers.