|Sounds like it may be a problem with the game site, not your computer. When's the last time you cleared out all your internet garbage files & temp folders?|
The problem with all-in-one PCs is that they have very limited upgradeability. As I've stated to a few others, what you bought is basically a laptop without the portability. Plus the graphics are weak. Here's a review of the Intel GMA graphics used in your system:
BTW, OpenOffice (which is free) can do anything MS Office can do & is also fully compatible with it.