Use Faststone Capture software! According to me it is the best screen capture and editing tool,it can capture scrolling windows too that is all what you need!
read about it's all features!
it can easily and very fastly join 2 pictures vertically or horizontally!
If any query,then comment! :)
Features
A small handy Capture Panel that provides quick access to its capture tools and output options
Global hotkeys to activate screen capturing instantly
Capture windows, objects, menus, full screen, rectangular/freehand regions and scrolling windows/web pages
Capture multiple windows and objects including multi-level menus
Record screen activities including onscreen changes, speech from microphone, mouse movements and clicks into highly compressed video files (Windows Media Video format). A built-in video editor allows you to draw annotations, apply zoom effects and cut unwanted sections
Options to specify output destination (internal editor, clipboard, file, printer ...)
Draw annotation objects such as texts, arrowed lines, highlights, watermarks, rectangles and circles
Apply effects such as drop-shadow, frame, torn-edge and fade-edge
Add image caption
Resize, crop, rotate, sharpen, brighten, adjust colors ...
Undo/Redo
Support tabs that allow you to capture and edit multiple screenshots simultaneously
Support external editors
Save in BMP, GIF, JPEG, PCX, PNG, TGA, TIFF and PDF formats
Acquire images from scanner
Convert images to a multi-page PDF file
Join images side by side to produce a single image file
Send captured images by email
Send captured images to Word and PowerPoint documents
Send captured images to a Web (FTP) server
Screen Color Picker
Screen Magnifier
Screen Crosshair
Screen Ruler
Support multiple monitors
Support touch interface (tap, swipe, pinch)
Run when Windows starts (optional)
Minimize to System Tray area
Small footprint in memory
And many more ...
Best Answer
There have been good answers already:
However there is usually no direct way to take screenshots from the BIOS setup assuming you want to get pictures of your host machine BIOS. The PrintScreen button might work in the BIOS but it will usually send the text-based output to the printer. Newer EFI/UEFI based ROMs might have built-in screenshot functionality but I've personally not come across such a feature in recent implementations. Moreover you would need storage like a USB stick with a file system writable by the setup tool (usually this would not be any Windows/NTFS drive).
Another solution might be a remote console device (also called IP KVM) as provided by companies like Raritan. These devices are connected to the video output (as well as keyboard and mouse) and provide a web interface which shows the screen output remotely. For VGA output the screen output is converted into digital pictures again; so strictly speaking it's not providing you the exact picture. You might also be able to use a DVI/HDMI frame grabber device like this which is simply connected to the DVI/HDMI output (such devices also exist for VGA but again, some quality loss might apply) and provides you with digital images again.
Also some management interfaces like Intel vPro or proprietary solutions might provide remote screen. However this is technically identical to the IP KVM solution in the end.
All these solutions require additional hardware or special hardware which has this capability already.