When you press the "Print Screen" key on the keyboard the whole Desktop is copied as an image to memory. If you then open your favored image editor you should be able to Paste that into a new image file.
For example. In Photoshop Elements 8, goto File > New and create a new file. Then goto Edit > Paste and click. That should transfer that Screen copy into the file. I assume Photoshop does have a New option in the File menu.
With Windows 7 your Paint, (may be named MS Paint or MSPaint.Net or similar), will be in Start > All programs > Accessories. With Paint you do not need to goto File > New. Just use Edit > Paste immediately.
I have a new HP desktop with Windows 7, my old Del had Windows XP. I am getting along with Windows 7 pretty well, but now I want to do something I have never done before and I am stuck. I read your instructions for converting an HTML file to a jpeg to ChuckT. I opened the page I wanted on the website and hit the Prt Scr key but nothing seemed to happen. I also looked in program files for Paint, and it is not there.
I do have Photoshop Elements 8 but it wants to open jpegs not MHTML files.