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Recover Password Of --> Linux Ubuntu , Windows XP, Windows Vista ,Windows 7 Somethims it happens that i forget my password.. what to do ??? here i will show you two ways for different OS (linux Ubuntu  and Windows XP )  1) Linux:  1. Reboot your computer and when you see GRUB Loading Screen press ESC so you come into the menu.  2. Now choose recovery mode  3. Chosse root shell prompt  4. now the system will show you cmd  to reset your pass use "passwd"  5. if you are finish with that reboot your system  command : reboot-f  2 ) Linux  1) choose the regular boot  2) use "e" to edit the settings  3) now hit the arrow key down over options and then use "e" to change to the edit mode  4) ok now you will get a scree with "single"  5) remove single with delete key and add this : rw init=/bin/bash  6) ok use "B" to boot with this settings  7) and now you get cmd and you...