The menu constantly pops-up on my Samsung 17 inch LDC monitor

What does the pop up menu say? I'm guessing it says something like "Optimal settings are 1280x1024, Press 1 to confirm, press 2 to disable". If the message is anything like this, your monitor is trying to tell you that your display settings are less than optimal. You can either disable the message by "pressing 2" or changing your display settings to the recommended resolution. If the menu you're getting is just the control panel and there's no actual message, leave your computer on, reach around the back and disconnect the power cable from the monitor, wait 5 seconds and plug it back in. Samsung monitors sometimes have a glitch and need to be reset.