1. Open DOS prompt.
2. Go to the particular directory.
3. Suppose you want to hide a file name text.txt which is placed Abc folder with path D:/New Folder/Abc
4. Now goto folder Abc.
5. Now Write "attrib text.txt +s +h +r +a" and press Enter Key
(The file will now not be visible to any one. You cannot view this file even if you have click on show hidden files in FOLDER OPTIONS).
In the similar manner, you can also hide the folders.
But you need not to go inside the folder.
Suppose in above example we want to hide Folder "Abc", then we go in DOS prompt upto New Folder only and the command is same.
For viewing/unhiding the file/holder use "attrib filename -s -h -r -a".
But the disadvantage is that you must not forget the name of the file/folder.

Immediate rapid shut down window
while shutting down window. open task manager(Ctr+Alt+Del),
Select shut down tab. and press ‘ Ctrl ‘ key while select Turn Off from this tab.
Count 5 4 3 2 1 Voila!!! U r window will rapidly shut down.