Pboot

hello

my father bougt me a computer when he was in japan. the seller told him that the windows is installed in the computer allready.
when i turned on the computer everything was fine but when i rebooted it all the changes that i did in the computer were deletet. i asked some friend of mine to check the computer and he told me that there is program called ‘Pboot’ in the computer that deletes all the changes during reboot. is there any way to unlock this thing so my computer will work allrigh?
regards
levan lm