You can speed up your OS by loading the kernel into the RAM :

- HKEY_LOCAL_MACHINE
\SYSTEM\CurrentControlSet
\Control\Session Manager\Memory Management\

In the right pane doubleclick the entry below and set its value to 1 (dec.) :

DisablePagingExecutive
Note :This will run the drivers and the kernel in the memory.

Now locate the entry below and set its value to 1 as well (decimal) :

LargeSystemCache
Note :Kernel performance will be improved.

If present doubleclick now the IOPageLockL entry(in later versions you
are done because it does not exist there anymore)If the key is there,
put values for the following memory possibilities :
4000 for 128 MB RAM
10000 for 256 MB RAM
40000 for more than 256 MB RAM

Note : This entry handles how many bytes can be used for I/O Operations