first of all, quit calling me dear.
If your LCD monitor is not automatically turning back on when you start your computer (WITHOUT you turning the monitor off first), than it may just be the monitor and nothing windows can do. You would have to buy a different, newer monitor. I am only refering to a situation in which you have already turned your computer off. If this happens while your computer is ON, than windows can fix it by disabling screen saver and changing the option to turn off monitor after so long in the power options page from the control panel. Set that option to "never".
Windows 7 is suited to your pc, all versions. However, 1 GB RAM is pretty low, you may be able to upgrade that RAM (buy another stick or two) for cheap. look up google to see what you can find online.
If you have problems (windows 7 is slow), than you can do things to speed it up: My man Brink has this tutorial that will help you out a bit: Optimize Windows 7
However, if one of these options gives you a warning that only advanced users should change a specific setting, then please skip that setting. Some settings, such as the registry, should almost never be changed.
You are not required to buy anything, they are only recommended to you as an option in order to get the very best out of your PC. Please completely read the tutorials, esspecially any text boxes marked in red, as they are warnings. Avoid changing critical settings. Let me know if you need any further help. Once again, I am not your dear
Dear is usually reserved as affection for a wife, husband, or very close friend, unless adding in my name, such as:
because it is a single word with two different meanings