Websites wont load properly

Hi,
Websites such as ebay, youtube, myspace and many others wont load properly. There is an error on page sign in the corner of the screen.
Sometimes, like the front page of ebay, open fine, but once you click into them they go all over the shop. The font changes to Times New Roman, and they are too big to fit in the web page properly.
Youtube also has the oversized fonts and the videos wont work.
I have just installed the new internet explorer and still it doesnt fix the problem. Ive tried to install the new Flash player like youtube told me, but it still didnt do anything.
The computer is an XP.
Any help is appreciated.

 

Thanks for the quick reply.

I tried the flash player and it didnt work.
But i downloaded Firefox and it works fine. Thanks for the help

 

I just try and stay away from using ie. Firefox is much better.