My computer monitor some times fluctuates. what i do for this?

Answer:

Some of ur Display Software might missed some files

for this u can

do a System restore

by following the steps

click on start

click on adjectives program

click on Accessories

click on system tools

click on system restore

then select a date and do a system restore

it will work fine
If the problem you're discussion about is the one I'm thinking of, it can be intricate on the eyes.

Go to start, programs, settings, control panel, display, settings, advanced, monitor and set the system refresh rate at a complex hertz.

It's easier than it sounds.