my monitor isnt working with my cpu

[silver]

my brother gave my his computer its a hp i think but when i connected it to my monitor(i dont know wat it is, but its says voxon in the corner) all that came up was a message that says something along the lines of " windows has successfuly read your adapter go to the control panel and click on settings and change them" wat does this mean?   ???i cant even get windows to come up. please help me ,thanks so much.

[GX1_Man]

Start thje machine and tap the F8 key a few times before the Windows logo to getg to safe mode. See what the graphics adapter is in Control Panel/System/Device Manager. Also check the monitor and google search for the horizontal and vertical rates from the manufacturer web site. let us know.