As for whats going on with the computer. First, every time you change pages if the issue occurs across all websites, then its most likely your browser. Try updating the browser, or re-installing it. Additionally, i think it might partially be due to age. I do not see the product listed on the Acer website as a product. And finally, i am going to guess your computer only has 512 mb of ram (256x2 sticks). This too might have an effect with your ability to view high memory intensive programs and websites.
thanks for your input but this cp was fine until my son took some things out and i put every thimg back in plus i put a fresh windows xp on it 2 days ago did all the updates im just going nuts again thanks its a acer travelmate2423wxci