If you need to know your system`s hardware configuration then either you can simply right click on my computer and click on properties to know a brief info that will tell you about the processor and ram installed in your computer as shown below
If you need more information you can simply type in msinfo32 in run window to see the detailed information about your computer
But if you need detailed and useful information about your computer hardware then Speccy can help you a lot,its a very nice software from Piriform the same company that developed Ccleaner the best free computer optimization software.You need to download the software from the below link
Now start the software as you normally start any software via Start >> All Programs >>Speccy and it will give you the detailed information about the hardware in your computer as shown below :
You can click on any hardware name on the left side and it will show you the detailed information on right side without much trouble with only few clicks