   Memory Leaks...
  How do you fix memory leaks?Is there a program you can use?I used to program horribly and now I can't retrieve that wasted 512+ megs of RAM I lost...This is really important!I need my memory!!!!!   
  Look the delete keyword up in MSDN :)(assuming you're using C++, not much information was given)Oh wait, you mean actually physically ending stuff in your operating system...  Not the code aspects of fixing mem leaks?If so, and you're using Windows XPctrl+alt+deleteOpen your task managerClick the Processes tabFind things that have your UserName next to them (you don't want to end system processes)right click an item -> end processclick okay, or yes, or whatever, memory freed up..;  Restart your computer... If that doesn't work you probably lost a stick of ram.   ;  I have the physical memory, it just isnt available...   ;  Meaning...  It is already in use?No?Hm... You got me there...If you have a memory stick, and the memory is being allocated (not being available), you can de-allocate programs in the processes tab of your task manager...   ;  Does restarting your computer work at all? If you have a clean boot up, and you cannot use the ram, than there is a signifacant chance that one of your sticks of ram inside the computer broke.   