DOS box
To clear the Command Prompt window, enter CLS
you have to use the command prompt(also called the DOS prompt by older users. You can find this by going to "start" , "programs" , "accessories" and "command prompt"
msconfig
exit
Defrag
press the 'x' in the corner. Type in the word exit.
start -> Run -> regedit
Typing in "cls" without the quotes and hitting enter will clear the command prompt window (DOS window) and show you just the current prompt such as "C:". If you search for "dos commands" you should find some lists of things that are available when you are in the command prompt. But be aware that not all are active on all computers and some commands can delete files and do other things that you may not really want. -)
command prompt
command prompt
command.com
Type exit to close the Command Prompt window, or click the red X in the corner. To shut down your computer, type shutdown -s