as in know u can only use more than 4 GB with 64 bit OS.
The usable memory with 32 bit Windows depends on the hardware installed on your pc / laptop because hardware also use memory for adressing .
For example if u have a video card with shared memory check Bios for how much menmory your video card takes from installed RAM.
pls follow this link
He is correct, you need to get yourself 64-bit OS to see that much RAM
Understood! thanks for your reply. ^^