My computer moniter is no showing any red color. Im not sure if its the moniter or the window vista.Any thought?

Answer:

your monitor is gone dude. time to return with a new one. bet this be a decade old.
I am fairly sure it's the monitor. Try looking at a picture/thing you know is red to confirm it.



This has happen to me before. Everything turned bluish.
Maybe your monitor may hold malfunctioned.
If you enjoy been using your monitor for few years consequently most probably the monitor need repair or modification new monitor.
It's probably the monitor. VGA monitors are totally different from TV sets and when a color go out, it's cheaper to get a exotic one than try to get the ancient one fixed
As a first step I would check the connection from your computer to the monitor to craft sure that it is tight. Failing that you probably have a monitor fault.
There are 3 color 'guns' inside your CRT. One of them is the red gun and it has apparently died.

Monitors are cheap now and repairing it wouldn't pay stale since the other two color guns are just as older.