Video Text is broken up & blurry...can't read emails. Graphics have red dots/lines. Monitor blacks out for a few seconds, and I can refresh it by moving the mouse.......help!

I really could use more information but will suggest updating the video drivers as well as the DirectX driver (9.0C) from Microsoft.

Since I have no idea on what all you have done, I have some questions / suggestions.
1st: Have you Defragmented your computer? If not this month, please do so ASAP.
2nd: How much free space is left on your hard drive? You need over 15% free space.
3rd: Have you cleaned out you cookies, temp Files & Temp. Internet Files?
4th: Every item you add or install anything on your computer, it starts running each time you boot up.
This eats up your limited power and processor.To see this you will need to use the CRTL/ALT/DELETE keys to open up your TASK MANAGER
On the right side you will see a TAB called START UP. Each item that is checked or ********** is running in the background.
You do not need this stuff running. Its a gift of Microsoft to make it start faster for you and is no longer a needed item since you have so much power.
Uncheck most if not all items, like MSN or YAHOO chat, Games and anything not directly related to the computer operation.