actually you could tweak your RAM with this way : 1. open notepad and copy code below and paste it into notepad. Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer] "AlwaysUnloadDLL"=dword:00000001 2. save it as YOUR FILENAME.reg (using .reg extension). 3. after that double clicking on it and it wil store the information to the windows regedit. it has function to unload unecessary .dll file (dynamic link library) from memory which some of running program using it the other method is : This command will force the OS to process all idle tasks. If your PC is never idle these tasks will never run. One of the tasks that Windows XP performs during idle times is the optimization of the files needed to start the OS. These files will be re-arranged on the disk and match the exact order they are loaded during startup. This list is in C:\Windows\Prefetch\Layout.ini To get more XP Speed Performance with the eye candy, follow the next steps: Click Start -> Run Type: rundll32.exe advapi32.dll,ProcessIdleTasks. Note: After all step, 3 idle tasks will operate in the background. Heavy disk access is likely. This process could continue for a few minutes.